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https://github.com/Correia-jpv/fucking-the-book-of-secret-knowledge
A collection of inspiring lists, manuals, cheatsheets, blogs, hacks, one-liners, cli/web tools and more. With repository stars⭐ and forks🍴
https://github.com/Correia-jpv/fucking-the-book-of-secret-knowledge
List: fucking-the-book-of-secret-knowledge
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A collection of inspiring lists, manuals, cheatsheets, blogs, hacks, one-liners, cli/web tools and more. With repository stars⭐ and forks🍴
- Host: GitHub
- URL: https://github.com/Correia-jpv/fucking-the-book-of-secret-knowledge
- Owner: Correia-jpv
- License: mit
- Created: 2022-07-21T15:27:46.000Z (over 2 years ago)
- Default Branch: main
- Last Pushed: 2024-05-22T06:49:21.000Z (7 months ago)
- Last Synced: 2024-05-22T12:16:52.334Z (7 months ago)
- Topics: awesome, awesome-list, bsd, cheatsheets, devops, guidelines, hacking, hacks, howtos, linux, lists, manuals, one-liners, pentesters, resources, search-engines, security, security-researchers, sysops
- Homepage:
- Size: 1.56 MB
- Stars: 156
- Watchers: 5
- Forks: 16
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Contributing: .github/CONTRIBUTING.md
- Funding: .github/FUNDING.yml
- License: LICENSE.md
- Code of conduct: .github/CODE_OF_CONDUCT.md
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- ultimate-awesome - fucking-the-book-of-secret-knowledge - A collection of inspiring lists, manuals, cheatsheets, blogs, hacks, one-liners, cli/web tools and more. With repository stars⭐ and forks🍴. (Other Lists / Monkey C Lists)
README
"Knowledge is powerful, be careful how you use it!"
A collection of inspiring lists, manuals, cheatsheets, blogs, hacks, one-liners, cli/web tools, and more.
****
## :notebook_with_decorative_cover: What is it?
This repository is a collection of various materials and tools that I use every day in my work. It contains a lot of useful information gathered in one piece. It is an invaluable source of knowledge for me that I often look back on.
## :restroom: For whom?
For everyone, really. Here everyone can find their favourite tastes. But to be perfectly honest, it is aimed towards System and Network administrators, DevOps, Pentesters, and Security Researchers.
## :information_source: Contributing
If you find something which doesn't make sense, or something doesn't seem right, please make a pull request and please add valid and well-reasoned explanations about your changes or comments.
A few simple rules for this project:
- inviting and clear
- not tiring
- useful
These below rules may be better:
- easy to contribute to (Markdown + HTML ...)
- easy to find (simple TOC, maybe it's worth extending them?)
Url marked **\*** is temporary unavailable. Please don't delete it without confirming that it has permanently expired.
Before adding a pull request, please see the **[contributing guidelines](.github/CONTRIBUTING.md)**. You should also remember about this:
```diff
+ This repository is not meant to contain everything but only good quality stuff.
```
All **suggestions/PR** are welcome!
### Code Contributors
This project exists thanks to all the people who contribute.
### Financial Contributors
## :newspaper: RSS Feed & Updates
GitHub exposes an [RSS/Atom](https://github.com/correia-jpv/fucking-the-book-of-secret-knowledge/commits.atom) feed of the commits, which may also be useful if you want to be kept informed about all changes.
## :ballot_box_with_check: ToDo
- [ ] Add new stuff...
- [ ] Add useful shell functions
- [ ] Add one-liners for collection tools (eg. CLI Tools)
- [ ] Sort order in lists
New items are also added on a regular basis.
## :anger: Table of Contents
Only main chapters:
- **[CLI Tools](#cli-tools-toc)**
- **[GUI Tools](#gui-tools-toc)**
- **[Web Tools](#web-tools-toc)**
- **[Systems/Services](#systemsservices-toc)**
- **[Networks](#networks-toc)**
- **[Containers/Orchestration](#containersorchestration-toc)**
- **[Manuals/Howtos/Tutorials](#manualshowtostutorials-toc)**
- **[Inspiring Lists](#inspiring-lists-toc)**
- **[Blogs/Podcasts/Videos](#blogspodcastsvideos-toc)**
- **[Hacking/Penetration Testing](#hackingpenetration-testing-toc)**
- **[Your daily knowledge and news](#your-daily-knowledge-and-news-toc)**
- **[Other Cheat Sheets](#other-cheat-sheets-toc)**
- **[Shell One-liners](#shell-one-liners-toc)**
- **[Shell Tricks](#shell-tricks-toc)**
- **[Shell Functions](#shell-functions-toc)**
## :trident: The Book of Secret Knowledge (Chapters)
#### CLI Tools [[TOC]](#anger-table-of-contents)
##### :black_small_square: Shells
🌎 GNU Bash - is an sh-compatible shell that incorporates useful features from the Korn shell and C shell.
🌎 Zsh - is a shell designed for interactive use, although it is also a powerful scripting language.
🌎 tclsh - is a very powerful cross-platform shell, suitable for a huge range of uses.
14306⭐ 2291🍴 bash-it - is a framework for using, developing and maintaining shell scripts and custom commands.
🌎 Oh My ZSH! - is the best framework for managing your Zsh configuration.
10506⭐ 808🍴 Oh My Fish - the Fishshell framework.
45683⭐ 1975🍴 Starship - the cross-shell prompt written in Rust.
46798⭐ 2204🍴 powerlevel10k - is a fast reimplementation of Powerlevel9k ZSH theme.
##### :black_small_square: Shell plugins
16400⭐ 1170🍴 z - tracks the folder you use the most and allow you to jump, without having to type the whole path.
65967⭐ 2407🍴 fzf - is a general-purpose command-line fuzzy finder.
31606⭐ 1876🍴 zsh-autosuggestions - Fish-like autosuggestions for Zsh.
20312⭐ 1332🍴 zsh-syntax-highlighting - Fish shell like syntax highlighting for Zsh.
15578⭐ 545🍴 Awesome ZSH Plugins - A list of frameworks, plugins, themes and tutorials for ZSH.
##### :black_small_square: Managers
🌎 Midnight Commander - is a visual file manager, licensed under GNU General Public License.
15698⭐ 892🍴 ranger - is a VIM-inspired filemanager for the console.
19434⭐ 765🍴 nnn - is a tiny, lightning fast, feature-packed file manager.
🌎 screen - is a full-screen window manager that multiplexes a physical terminal.
?⭐ ?🍴 tmux - is a terminal multiplexer, lets you switch easily between several programs in one terminal.
233⭐ 38🍴 tmux-cssh - is a tool to set comfortable and easy to use functionality tmux-sessions.
##### :black_small_square: Text editors
vi - is one of the most common text editors on Unix.
🌎 vim - is a highly configurable text editor.
🌎 emacs - is an extensible, customizable, free/libre text editor, and more.
25297⭐ 1180🍴 micro - is a modern and intuitive terminal-based text editor.
🌎 neovim - is a free open source, powerful, extensible and usable code editor.
🌎 spacemacs - a community-driven Emacs distribution.
🌎 spacevim - a community-driven vim distribution.
##### :black_small_square: Files and directories
34354⭐ 815🍴 fd - is a simple, fast and user-friendly alternative to find.
🌎 ncdu - is an easy to use, fast disk usage analyzer.
##### :black_small_square: Network
🌎 PuTTY - is an SSH and telnet client, developed originally by Simon Tatham.
🌎 Mosh - is a SSH wrapper designed to keep a SSH session alive over a volatile connection.
🌎 Eternal Terminal - enables mouse-scrolling and tmux commands inside the SSH session.
🌎 nmap - is a free and open source (license) utility for network discovery and security auditing.
5553⭐ 920🍴 zmap - is a fast single packet network scanner designed for Internet-wide network surveys.
14833⭐ 1003🍴 Rust Scan - to find all open ports faster than Nmap.
23781⭐ 3082🍴 masscan - is the fastest Internet port scanner, spews SYN packets asynchronously.
160⭐ 36🍴 pbscan - is a faster and more efficient stateless SYN scanner and banner grabber.
hping - is a command-line oriented TCP/IP packet assembler/analyzer.
2716⭐ 342🍴 mtr - is a tool that combines the functionality of the 'traceroute' and 'ping' programs in a single tool.
2696⭐ 233🍴 mylg - utility which combines the functions of the different network probes in one diagnostic tool.
netcat - utility which reads and writes data across network connections, using the TCP/IP protocol.
socat - utility which transfers data between two objects.
🌎 tcpdump - is a powerful command-line packet analyzer.
🌎 tshark - is a tool that allows us to dump and analyze network traffic (wireshark cli).
🌎 Termshark - is a simple terminal user-interface for tshark.
904⭐ 101🍴 ngrep - is like GNU grep applied to the network layer.
netsniff-ng - is a Swiss army knife for your daily Linux network plumbing if you will.
367⭐ 49🍴 sockdump - dump unix domain socket traffic.
1789⭐ 238🍴 stenographer - is a packet capture solution which aims to quickly spool all packets to disk.
455⭐ 27🍴 tcpterm - visualize packets in TUI.
1200⭐ 98🍴 bmon - is a monitoring and debugging tool to capture networking related statistics and prepare them visually.
iptraf-ng - is a console-based network monitoring program for Linux that displays information about IP traffic.
1457⭐ 123🍴 vnstat - is a network traffic monitor for Linux and BSD.
🌎 iPerf3 - is a tool for active measurements of the maximum achievable bandwidth on IP networks.
5791⭐ 399🍴 ethr - is a Network Performance Measurement Tool for TCP, UDP & HTTP.
176⭐ 19🍴 Etherate - is a Linux CLI based Ethernet and MPLS traffic testing tool.
4028⭐ 526🍴 echoip - is a IP address lookup service.
498⭐ 69🍴 Nemesis - packet manipulation CLI tool; craft and inject packets of several protocols.
381⭐ 88🍴 packetfu - a mid-level packet manipulation library for Ruby.
🌎 Scapy - packet manipulation library; forge, send, decode, capture packets of a wide number of protocols.
13606⭐ 3596🍴 impacket - is a collection of Python classes for working with network protocols.
2958⭐ 268🍴 ssh-audit - is a tool for SSH server auditing.
🌎 aria2 - is a lightweight multi-protocol & multi-source command-line download utility.
257⭐ 30🍴 iptables-tracer - observe the path of packets through the iptables chains.
366⭐ 65🍴 inception - a highly configurable tool to check for whatever you like against any number of hosts.
🌎 mRemoteNG - a fork of mRemote, multi-tabbed PuTTy on steroids!
##### :black_small_square: Network (DNS)
946⭐ 100🍴 dnsdiag - is a DNS diagnostics and performance measurement tools.
1617⭐ 201🍴 fierce - is a DNS reconnaissance tool for locating non-contiguous IP space.
10368⭐ 1285🍴 subfinder - is a subdomain discovery tool that discovers valid subdomains for websites.
9912⭐ 2109🍴 sublist3r - is a fast subdomains enumeration tool for penetration testers.
12152⭐ 1900🍴 amass - is tool that obtains subdomain names by scraping data sources, crawling web archives, and more.
900⭐ 153🍴 namebench - provides personalized DNS server recommendations based on your browsing history.
3177⭐ 469🍴 massdns - is a high-performance DNS stub resolver for bulk lookups and reconnaissance.
3890⭐ 863🍴 knock - is a tool to enumerate subdomains on a target domain through a wordlist.
422⭐ 67🍴 dnsperf - DNS performance testing tools.
11503⭐ 1016🍴 dnscrypt-proxy 2 - a flexible DNS proxy, with support for encrypted DNS protocols.
94⭐ 22🍴 dnsdbq - API client providing access to passive DNS database systems.
1390⭐ 106🍴 grimd - fast dns proxy, built to black-hole internet advertisements and malware servers.
4936⭐ 775🍴 dnstwist - detect typosquatters, phishing attacks, fraud, and brand impersonation.
##### :black_small_square: Network (HTTP)
🌎 curl - is a command line tool and library for transferring data with URLs.
🌎 kurly - is an alternative to the widely popular curl program, written in Golang.
34103⭐ 3684🍴 HTTPie - is an user-friendly HTTP client.
10580⭐ 412🍴 wuzz - is an interactive cli tool for HTTP inspection.
665⭐ 75🍴 h2spec - is a conformance testing tool for HTTP/2 implementation.
394⭐ 36🍴 h2t - is a simple tool to help sysadmins to hardening their websites.
3761⭐ 235🍴 htrace.sh - is a simple Swiss Army knife for http/https troubleshooting and profiling.
5995⭐ 386🍴 httpstat - is a tool that visualizes curl statistics in a way of beauty and clarity.
4051⭐ 121🍴 httplab - is an interactive web server.
🌎 Lynx - is a text browser for the World Wide Web.
?⭐ ?🍴 Browsh - is a fully interactive, real-time, and modern text-based browser.
6251⭐ 426🍴 HeadlessBrowsers - a list of (almost) all headless web browsers in existence.
🌎 ab - is a single-threaded command line tool for measuring the performance of HTTP web servers.
🌎 siege - is an http load testing and benchmarking utility.
38131⭐ 2950🍴 wrk - is a modern HTTP benchmarking tool capable of generating significant load.
4281⭐ 395🍴 wrk2 - is a constant throughput, correct latency recording variant of wrk.
23669⭐ 1373🍴 vegeta - is a constant throughput, correct latency recording variant of wrk.
6068⭐ 317🍴 bombardier - is a fast cross-platform HTTP benchmarking tool written in Go.
446⭐ 96🍴 gobench - http/https load testing and benchmarking tool.
18256⭐ 1195🍴 hey - HTTP load generator, ApacheBench (ab) replacement, formerly known as rakyll/boom.
1216⭐ 99🍴 boom - is a script you can use to quickly smoke-test your web app deployment.
1514⭐ 303🍴 SlowHTTPTest - is a tool that simulates some Application Layer Denial of Service attacks by prolonging HTTP.
10255⭐ 1224🍴 gobuster - is a free and open source directory/file & DNS busting tool written in Go.
1705⭐ 243🍴 ssllabs-scan - command-line reference-implementation client for SSL Labs APIs.
1860⭐ 170🍴 http-observatory - Mozilla HTTP Observatory cli version.
🌎 Hurl - is a command line tool to run and test HTTP requests with plain text.
##### :black_small_square: SSL
🌎 openssl - is a robust, commercial-grade, and full-featured toolkit for the TLS and SSL protocols.
🌎 gnutls-cli - client program to set up a TLS connection to some other computer.
sslyze
- fast and powerful SSL/TLS server scanning library.
2353⭐ 384🍴 sslscan - tests SSL/TLS enabled services to discover supported cipher suites.
8021⭐ 1027🍴 testssl.sh - testing TLS/SSL encryption anywhere on any port.
1966⭐ 266🍴 cipherscan - a very simple way to find out which SSL ciphersuites are supported by a target.
spiped - is a utility for creating symmetrically encrypted and authenticated pipes between socket addresses.
31666⭐ 3410🍴 Certbot - is EFF's tool to obtain certs from Let's Encrypt and (optionally) auto-enable HTTPS on your server.
50733⭐ 2663🍴 mkcert - simple zero-config tool to make locally trusted development certificates with any names you'd like.
2315⭐ 207🍴 certstrap - tools to bootstrap CAs, certificate requests, and signed certificates.
991⭐ 165🍴 Sublert - is a security and reconnaissance tool to automatically monitor new subdomains.
360⭐ 52🍴 mkchain - open source tool to help you build a valid SSL certificate chain.
740⭐ 289🍴 ssl-cert-check - SSL Certification Expiration Checker.
##### :black_small_square: Security
🌎 SELinux - provides a flexible Mandatory Access Control (MAC) system built into the Linux kernel.
🌎 AppArmor - proactively protects the operating system and applications from external or internal threats.
961⭐ 84🍴 grapheneX - Automated System Hardening Framework.
DevSec Hardening Framework - Security + DevOps: Automatic Server Hardening.
##### :black_small_square: Auditing Tools
🌎 ossec - actively monitoring all aspects of system activity with file integrity monitoring.
🌎 auditd - provides a way to track security-relevant information on your system.
🌎 Tiger - is a security tool that can be use both as a security audit and intrusion detection system.
🌎 Lynis - battle-tested security tool for systems running Linux, macOS, or Unix-based operating system.
7070⭐ 1994🍴 LinEnum - scripted Local Linux Enumeration & Privilege Escalation Checks.
131⭐ 33🍴 Rkhunter - scanner tool for Linux systems that scans backdoors, rootkits and local exploits on your systems.
3118⭐ 434🍴 PE-sieve - is a light-weight tool that helps to detect malware running on the system.
16320⭐ 3113🍴 PEASS - privilege escalation tools for Windows and Linux/Unix and MacOS.
##### :black_small_square: System Diagnostics/Debuggers
2259⭐ 432🍴 strace - diagnostic, debugging and instructional userspace utility for Linux.
DTrace - is a performance analysis and troubleshooting tool.
🌎 ltrace - is a library call tracer, used to trace calls made by programs to library functions.
129⭐ 7🍴 ptrace-burrito - is a friendly wrapper around ptrace.
9907⭐ 1646🍴 perf-tools - performance analysis tools based on Linux perf_events (aka perf) and ftrace.
8702⭐ 1360🍴 bpftrace - high-level tracing language for Linux eBPF.
7797⭐ 728🍴 sysdig - system exploration and troubleshooting tool with first class support for containers.
Valgrind - is an instrumentation framework for building dynamic analysis tools.
8497⭐ 1501🍴 gperftools - high-performance multi-threaded malloc() implementation, plus some performance analysis tools.
🌎 glances - cross-platform system monitoring tool written in Python.
5851⭐ 579🍴 htop - interactive text-mode process viewer for Unix systems. It aims to be a better 'top'.
10816⭐ 552🍴 bashtop - Linux resource monitor written in pure Bash.
nmon - a single executable for performance monitoring and data analysis.
🌎 atop - ASCII performance monitor. Includes statistics for CPU, memory, disk, swap, network, and processes.
🌎 lsof - displays in its output information about files that are opened by processes.
FlameGraph - stack trace visualizer.
1018⭐ 33🍴 lsofgraph - convert Unix lsof output to a graph showing FIFO and UNIX interprocess communication.
9219⭐ 588🍴 rr - is a lightweight tool for recording, replaying and debugging execution of applications.
🌎 Performance Co-Pilot - a system performance analysis toolkit.
9193⭐ 233🍴 hexyl - a command-line hex viewer.
1929⭐ 57🍴 Austin - Python frame stack sampler for CPython.
##### :black_small_square: Log Analyzers
3518⭐ 74🍴 angle-grinder - slice and dice log files on the command line.
🌎 lnav - log file navigator with search and automatic refresh.
🌎 GoAccess - real-time web log analyzer and interactive viewer that runs in a terminal.
6488⭐ 473🍴 ngxtop - real-time metrics for nginx server.
##### :black_small_square: Databases
9102⭐ 353🍴 usql - universal command-line interface for SQL databases.
12168⭐ 556🍴 pgcli - postgres CLI with autocompletion and syntax highlighting.
11502⭐ 664🍴 mycli - terminal client for MySQL with autocompletion and syntax highlighting.
2824⭐ 80🍴 litecli - SQLite CLI with autocompletion and syntax highlighting.
1365⭐ 190🍴 mssql-cli - SQL Server CLI with autocompletion and syntax highlighting.
21927⭐ 2458🍴 OSQuery - is a SQL powered operating system instrumentation, monitoring, and analytics framework.
3190⭐ 201🍴 pgsync - sync data from one Postgres database to another.
2569⭐ 113🍴 iredis - a terminal client for redis with autocompletion and syntax highlighting.
🌎 SchemaCrawler - generates an E-R diagram of your database.
##### :black_small_square: TOR
1962⭐ 315🍴 Nipe - script to make Tor Network your default gateway.
1063⭐ 174🍴 multitor - a tool that lets you create multiple TOR instances with a load-balancing.
##### :black_small_square: Messengers/IRC Clients
🌎 Irssi - is a free open source terminal based IRC client.
🌎 WeeChat - is an extremely extensible and lightweight IRC client.
##### :black_small_square: Productivity
🌎 taskwarrior - task management system, todo list
##### :black_small_square: Other
958⭐ 110🍴 sysadmin-util - tools for Linux/Unix sysadmins.
incron - is an inode-based filesystem notification technology.
5762⭐ 475🍴 lsyncd - synchronizes local directories with remote targets (Live Syncing Daemon).
4033⭐ 99🍴 GRV - is a terminal based interface for viewing Git repositories.
🌎 Tig - text-mode interface for Git.
51575⭐ 4240🍴 tldr - simplified and community-driven man pages.
4445⭐ 391🍴 archiver - easily create and extract .zip, .tar, .tar.gz, .tar.bz2, .tar.xz, .tar.lz4, .tar.sz, and .rar.
26845⭐ 1696🍴 commander.js - minimal CLI creator in JavaScript.
13885⭐ 329🍴 gron - make JSON greppable!
1276⭐ 46🍴 bed - binary editor written in Go.
#### GUI Tools [[TOC]](#anger-table-of-contents)
##### :black_small_square: Terminal emulators
4456⭐ 579🍴 Guake - is a dropdown terminal made for the GNOME desktop environment.
🌎 Terminator - is based on GNOME Terminal, useful features for sysadmins and other users.
🌎 Kitty - is a GPU based terminal emulator that supports smooth scrolling and images.
56721⭐ 3030🍴 Alacritty - is a fast, cross-platform, OpenGL terminal emulator.
##### :black_small_square: Network
🌎 Wireshark - is the world’s foremost and widely-used network protocol analyzer.
🌎 Ettercap - is a comprehensive network monitor tool.
🌎 EtherApe - is a graphical network monitoring solution.
🌎 Packet Sender - is a networking utility for packet generation and built-in UDP/TCP/SSL client and servers.
🌎 Ostinato - is a packet crafter and traffic generator.
🌎 JMeter™ - open source software to load test functional behavior and measure performance.
25169⭐ 3003🍴 locust - scalable user load testing tool written in Python.
##### :black_small_square: Browsers
🌎 TOR Browser - protect your privacy and defend yourself against network surveillance and traffic analysis.
##### :black_small_square: Password Managers
🌎 KeePassXC - store your passwords safely and auto-type them into your everyday websites and apps.
🌎 Bitwarden - open source password manager with built-in sync.
?⭐ ?🍴 Vaultwarden - unofficial Bitwarden compatible server written in Rust.
##### :black_small_square: Messengers/IRC Clients
🌎 HexChat - is an IRC client based on XChat.
🌎 Pidgin - is an easy to use and free chat client used by millions.
##### :black_small_square: Messengers (end-to-end encryption)
🌎 Signal - is an encrypted communications app.
🌎 Wire - secure messaging, file sharing, voice calls and video conferences.
950⭐ 271🍴 TorChat - decentralized anonymous instant messenger on top of Tor Hidden Services.
🌎 Matrix - an open network for secure, decentralized, real-time communication.
##### :black_small_square: Text editors
🌎 Sublime Text - is a lightweight, cross-platform code editor known for its speed, ease of use.
🌎 Visual Studio Code - an open-source and free source code editor developed by Microsoft.
🌎 Atom - a hackable text editor for the 21st Century.
#### Web Tools [[TOC]](#anger-table-of-contents)
##### :black_small_square: Browsers
🌎 SSL/TLS Capabilities of Your Browser - test your browser's SSL implementation.
🌎 Can I use - provides up-to-date browser support tables for support of front-end web technologies.
🌎 Panopticlick 3.0 - is your browser safe against tracking?
🌎 Privacy Analyzer - see what data is exposed from your browser.
🌎 Web Browser Security - it's all about Web Browser fingerprinting.
🌎 How's My SSL? - help a web server developer learn what real world TLS clients were capable of.
🌎 sslClientInfo - client test (incl TLSv1.3 information).
##### :black_small_square: SSL/Security
🌎 SSLLabs Server Test - performs a deep analysis of the configuration of any SSL web server.
🌎 SSLLabs Server Test (DEV) - performs a deep analysis of the configuration of any SSL web server.
🌎 ImmuniWeb® SSLScan - test SSL/TLS (PCI DSS, HIPAA and NIST).
🌎 SSL Check - scan your website for non-secure content.
SSL Scanner - analyze website security.
🌎 CryptCheck - test your TLS server configuration (e.g. ciphers).
🌎 urlscan.io - service to scan and analyse websites.
🌎 Report URI - monitoring security policies like CSP and HPKP.
🌎 CSP Evaluator - allows developers and security experts to check if a Content Security Policy.
🌎 Useless CSP - public list about CSP in some big players (might make them care a bit more).
🌎 Why No HTTPS? - top 100 websites by Alexa rank not automatically redirecting insecure requests.
🌎 TLS Cipher Suite Search- cipher suite search engine.
314⭐ 129🍴 cipherli.st - strong ciphers for Apache, Nginx, Lighttpd, and more.*
🌎 dhtool - public Diffie-Hellman parameter service/tool.
🌎 badssl.com - memorable site for testing clients against bad SSL configs.
🌎 tlsfun.de - registered for various tests regarding the TLS/SSL protocol.
🌎 CAA Record Helper - generate a CAA policy.
🌎 Common CA Database - repository of information about CAs, and their root and intermediate certificates.
🌎 CERTSTREAM - real-time certificate transparency log update stream.
🌎 crt.sh - discovers certificates by continually monitoring all of the publicly known CT.
🌎 Hardenize - deploy the security standards.
🌎 Cipher suite compatibility - test TLS cipher suite compatibility.
🌎 urlvoid - this service helps you detect potentially malicious websites.
🌎 security.txt - a proposed standard (generator) which allows websites to define security policies.
375⭐ 60🍴 ssl-config-generator - help you follow the Mozilla Server Side TLS configuration guidelines.
25⭐ 11🍴 TLScan - pure python, SSL/TLS protocol and cipher scanner/enumerator.
##### :black_small_square: HTTP Headers & Web Linters
🌎 Security Headers - analyse the HTTP response headers (with rating system to the results).
🌎 Observatory by Mozilla - set of tools to analyze your website.
🌎 webhint - is a linting tool that will help you with your site's accessibility, speed, security, and more.
##### :black_small_square: DNS
ViewDNS - one source for free DNS related tools and information.
🌎 DNSLookup - is an advanced DNS lookup tool.
🌎 DNSlytics - online DNS investigation tool.
🌎 DNS Spy - monitor, validate and verify your DNS configurations.
🌎 Zonemaster - helps you to control how your DNS works.
Leaf DNS - comprehensive DNS tester.
🌎 Find subdomains online - find subdomains for security assessment penetration test.
🌎 DNSdumpster - dns recon & research, find & lookup dns records.
🌎 DNS Table online - search for DNS records by domain, IP, CIDR, ISP.
🌎 intoDNS - DNS and mail server health checker.
DNS Bajaj - check the delegation of your domain.
🌎 BuddyDNS Delegation LAB - check, trace and visualize delegation of your domain.
🌎 dnssec-debugger - DS or DNSKEY records validator.
PTRarchive.com - this site is responsible for the safekeeping of historical reverse DNS records.
xip.io - wildcard DNS for everyone.
🌎 nip.io - dead simple wildcard DNS for any IP Address.
🌎 dnslookup (ceipam) - one of the best DNS propagation checker (and not only).
🌎 What's My DNS - DNS propagation checking tool.
🌎 DNSGrep - quickly searching large DNS datasets.
##### :black_small_square: Mail
🌎 smtp-tls-checker - check an email domain for SMTP TLS support.
🌎 MX Toolbox - all of your MX record, DNS, blacklist and SMTP diagnostics in one integrated tool.
🌎 Secure Email - complete email test tools for email technicians.
blacklistalert - checks to see if your domain is on a Real Time Spam Blacklist.
MultiRBL - complete IP check for sending Mailservers.
🌎 DKIM SPF & Spam Assassin Validator - checks mail authentication and scores messages with Spam Assassin.
##### :black_small_square: Encoders/Decoders and Regex testing
🌎 URL Encode/Decode - tool from above to either encode or decode a string of text.
🌎 Uncoder - the online translator for search queries on log data.
🌎 Regex101 - online regex tester and debugger: PHP, PCRE, Python, Golang and JavaScript.
🌎 RegExr - online tool to learn, build, & test Regular Expressions (RegEx / RegExp).
🌎 RegEx Testing - online regex testing tool.
🌎 RegEx Pal - online regex testing tool + other tools.
🌎 The Cyber Swiss Army Knife - a web app for encryption, encoding, compression and data analysis.
##### :black_small_square: Net-tools
🌎 Netcraft - detailed report about the site, helping you to make informed choices about their integrity.*
🌎 RIPE NCC Atlas - a global, open, distributed Internet measurement platform.
🌎 Robtex - uses various sources to gather public information about IP numbers, domain names, host names, etc.
🌎 Security Trails - APIs for Security Companies, Researchers and Teams.
🌎 Online Curl - curl test, analyze HTTP Response Headers.
🌎 Online Tools for Developers - HTTP API tools, testers, encoders, converters, formatters, and other tools.
🌎 Ping.eu - online Ping, Traceroute, DNS lookup, WHOIS and others.
🌎 Network-Tools - network tools for webmasters, IT technicians & geeks.
🌎 BGPview - search for any ASN, IP, Prefix or Resource name.
🌎 Is BGP safe yet? - check BGP (RPKI) security of ISPs and other major Internet players.
🌎 Riseup - provides online communication tools for people and groups working on liberatory social change.
🌎 VirusTotal - analyze suspicious files and URLs to detect types of malware.
##### :black_small_square: Privacy
🌎 privacyguides.org - provides knowledge and tools to protect your privacy against global mass surveillance.
🌎 DNS Privacy Test Servers - DNS privacy recursive servers list (with a 'no logging' policy).
##### :black_small_square: Code parsers/playgrounds
🌎 ShellCheck - finds bugs in your shell scripts.
🌎 explainshell - get interactive help texts for shell commands.
🌎 jsbin - live pastebin for HTML, CSS & JavaScript, and more.
🌎 CodeSandbox - online code editor for web application development.
PHP Sandbox - test your PHP code with this code tester.
🌎 Repl.it - an instant IDE to learn, build, collaborate, and host all in one place.
vclFiddle - is an online tool for experimenting with the Varnish Cache VCL.
10499⭐ 426🍴 Haskell Dockerfile Linter - a smarter Dockerfile linter that helps you build best practice Docker images.
##### :black_small_square: Performance
🌎 GTmetrix - analyze your site’s speed and make it faster.
🌎 Sucuri loadtimetester - test here the
performance of any of your sites from across the globe.
🌎 Pingdom Tools - analyze your site’s speed around the world.
🌎 PingMe.io - run website latency tests across multiple geographic regions.
🌎 PageSpeed Insights - analyze your site’s speed and make it faster.
🌎 web.dev - helps developers like you learn and apply the web's modern capabilities to your own sites and apps.
28484⭐ 9393🍴 Lighthouse - automated auditing, performance metrics, and best practices for the web.
##### :black_small_square: Mass scanners (search engines)
🌎 Censys - platform that helps information security practitioners discover, monitor, and analyze devices.
🌎 Shodan - the world's first search engine for Internet-connected devices.
🌎 Shodan 2000 - this tool looks for randomly generated data from Shodan.
🌎 GreyNoise - mass scanner such as Shodan and Censys.
🌎 ZoomEye - search engine for cyberspace that lets the user find specific network components.
🌎 netograph - tools to monitor and understand deep structure of the web.
🌎 FOFA - is a cyberspace search engine.
🌎 onyphe - is a search engine for open-source and cyber threat intelligence data collected.
🌎 IntelligenceX - is a search engine and data archive.
🌎 binaryedge - it scan the entire internet space and create real-time threat intelligence streams and reports.
🌎 Spyse - Internet assets registry: networks, threats, web objects, etc.
🌎 wigle - is a submission-based catalog of wireless networks. All the networks. Found by Everyone.
🌎 PublicWWW - find any alphanumeric snippet, signature or keyword in the web pages HTML, JS and CSS code.
🌎 IntelTechniques - this repository contains hundreds of online search utilities.
🌎 hunter - lets you find email addresses in seconds and connect with the people that matter for your business.
🌎 GhostProject? - search by full email address or username.
🌎 databreaches - was my email affected by data breach?
🌎 We Leak Info - world's fastest and largest data breach search engine.
🌎 Pulsedive - scans of malicious URLs, IPs, and domains, including port scans and web requests.
🌎 Buckets by Grayhatwarfar - database with public search for Open Amazon S3 Buckets and their contents.
🌎 Vigilante.pw - the breached database directory.
🌎 builtwith - find out what websites are built with.
🌎 NerdyData - search the web's source code for technologies, across millions of sites.
zorexeye - search for sites, images, apps, softwares & more.
🌎 Mamont's open FTP Index - if a target has an open FTP site with accessible content it will be listed here.
🌎 OSINT Framework - focused on gathering information from free tools or resources.
🌎 maltiverse - is a service oriented to cybersecurity analysts.
🌎 Leaked Source - is a collaboration of data found online in the form of a lookup.
🌎 We Leak Info - to help everyday individuals secure their online life, avoiding getting hacked.
🌎 pipl - is the place to find the person behind the email address, social username or phone number.
🌎 abuse.ch - is operated by a random swiss guy fighting malware for non-profit.
malc0de - malware search engine.
🌎 Cybercrime Tracker - monitors and tracks various malware families that are used to perpetrate cyber crimes.
?⭐ ?🍴 shhgit - find GitHub secrets in real time.
🌎 searchcode - helping you find real world examples of functions, API's and libraries.
Insecam - the world biggest directory of online surveillance security cameras.
index-of - contains great stuff like: security, hacking, reverse engineering, cryptography, programming etc.
🌎 Rapid7 Labs Open Data - is a great resources of datasets from Project Sonar.
🌎 Common Response Headers - the largest database of HTTP response headers.
🌎 InQuest Labs - InQuest Labs is an open, interactive, and API driven data portal for security researchers.
##### :black_small_square: Generators
🌎 thispersondoesnotexist - generate fake faces in one click - endless possibilities.
🌎 AI Generated Photos - 100.000 AI generated faces.
🌎 fakenamegenerator - your randomly generated identity.
🌎 Intigriti Redirector - open redirect/SSRF payload generator.
##### :black_small_square: Passwords
🌎 have i been pwned? - check if you have an account that has been compromised in a data breach.
🌎 dehashed - is a hacked database search engine.
🌎 Leaked Source - is a collaboration of data found online in the form of a lookup.
##### :black_small_square: CVE/Exploits databases
🌎 CVE Mitre - list of publicly known cybersecurity vulnerabilities.
🌎 CVE Details - CVE security vulnerability advanced database.
🌎 Exploit DB - CVE compliant archive of public exploits and corresponding vulnerable software.
🌎 0day.today - exploits market provides you the possibility to buy/sell zero-day exploits.
🌎 sploitus - the exploit and tools database.
🌎 cxsecurity - free vulnerability database.
🌎 Vulncode-DB - is a database for vulnerabilities and their corresponding source code if available.
🌎 cveapi - free API for CVE data.
##### :black_small_square: Mobile apps scanners
🌎 ImmuniWeb® Mobile App Scanner - test security and privacy of mobile apps (iOS & Android).
🌎 Quixxi - free Mobile App Vulnerability Scanner for Android & iOS.
🌎 Ostorlab - analyzes mobile application to identify vulnerabilities and potential weaknesses.
##### :black_small_square: Private Search Engines
🌎 Startpage - the world's most private search engine.
🌎 searX - a privacy-respecting, hackable metasearch engine.
🌎 darksearch - the 1st real Dark Web search engine.
🌎 Qwant - the search engine that respects your privacy.
🌎 DuckDuckGo - the search engine that doesn't track you.
🌎 Swisscows - privacy safe web search
🌎 Disconnect - the search engine that anonymizes your searches.
🌎 MetaGer - the search engine that uses anonymous proxy and hidden Tor branches.
##### :black_small_square: Secure Webmail Providers
🌎 CounterMail - online email service, designed to provide maximum security and privacy.
Mail2Tor - is a Tor Hidden Service that allows anyone to send and receive emails anonymously.
🌎 Tutanota - is the world's most secure email service and amazingly easy to use.
🌎 Protonmail - is the world's largest secure email service, developed by CERN and MIT scientists.
🌎 Startmail - private & encrypted email made easy.
##### :black_small_square: Crypto
🌎 Keybase - it's open source and powered by public-key cryptography.
##### :black_small_square: PGP Keyservers
🌎 SKS OpenPGP Key server - services for the SKS keyservers used by OpenPGP.
#### Systems/Services [[TOC]](#anger-table-of-contents)
##### :black_small_square: Operating Systems
Slackware - the most "Unix-like" Linux distribution.
🌎 OpenBSD - multi-platform 4.4BSD-based UNIX-like operating system.
🌎 HardenedBSD - HardenedBSD aims to implement innovative exploit mitigation and security solutions.
🌎 Kali Linux - Linux distribution used for Penetration Testing, Ethical Hacking and network security assessments.
🌎 Parrot Security OS - cyber security GNU/Linux environment.
🌎 Backbox Linux - penetration test and security assessment oriented Ubuntu-based Linux distribution.
🌎 BlackArch - is an Arch Linux-based penetration testing distribution for penetration testers.
🌎 Pentoo - is a security-focused livecd based on Gentoo.
🌎 Security Onion - Linux distro for intrusion detection, enterprise security monitoring, and log management.
🌎 Tails - is a live system that aims to preserve your privacy and anonymity.
296⭐ 30🍴 vedetta - OpenBSD router boilerplate.
🌎 Qubes OS - is a security-oriented OS that uses Xen-based virtualization.
##### :black_small_square: HTTP(s) Services
🌎 Varnish Cache - HTTP accelerator designed for content-heavy dynamic web sites.
🌎 Nginx - open source web and reverse proxy server that is similar to Apache, but very light weight.
🌎 OpenResty - is a dynamic web platform based on NGINX and LuaJIT.
12840⭐ 2516🍴 Tengine - a distribution of Nginx with some advanced features.
🌎 Caddy Server - is an open source, HTTP/2-enabled web server with HTTPS by default.
🌎 HAProxy - the reliable, high performance TCP/HTTP load balancer.
##### :black_small_square: DNS Services
🌎 Unbound - validating, recursive, and caching DNS resolver (with TLS).
🌎 Knot Resolver - caching full resolver implementation, including both a resolver library and a daemon.
🌎 PowerDNS - is an open source authoritative DNS server, written in C++ and licensed under the GPL.
##### :black_small_square: Other Services
3981⭐ 777🍴 3proxy - tiny free proxy server.
##### :black_small_square: Security/hardening
🌎 Emerald Onion - is a 501(c)(3) nonprofit organization and transit internet service provider (ISP).
49374⭐ 2703🍴 pi-hole - the Pi-hole® is a DNS sinkhole that protects your devices from unwanted content.
6614⭐ 1095🍴 maltrail - malicious traffic detection system.
4355⭐ 800🍴 security_monkey - monitors AWS, GCP, OpenStack, and GitHub orgs for assets and their changes over time.
26374⭐ 1825🍴 firecracker - secure and fast microVMs for serverless computing.
23208⭐ 1987🍴 streisand - sets up a new server running your choice of WireGuard, OpenSSH, OpenVPN, and more.
#### Networks [[TOC]](#anger-table-of-contents)
##### :black_small_square: Tools
🌎 CapAnalysis - web visual tool to analyze large amounts of captured network traffic (PCAP analyzer).
16390⭐ 2603🍴 netbox - IP address management (IPAM) and data center infrastructure management (DCIM) tool.
##### :black_small_square: Labs
🌎 NRE Labs - learn automation by doing it. Right now, right here, in your browser.
##### :black_small_square: Other
🌎 LBNL's Network Research Group - home page of the Network Research Group (NRG).
#### Containers/Orchestration [[TOC]](#anger-table-of-contents)
##### :black_small_square: CLI Tools
15898⭐ 1306🍴 gvisor - container runtime sandbox.
15624⭐ 528🍴 ctop - top-like interface for container metrics.
##### :black_small_square: Web Tools
68854⭐ 18671🍴 Moby - a collaborative project for the container ecosystem to assemble container-based system.
🌎 Traefik - open source reverse proxy/load balancer provides easier integration with Docker and Let's encrypt.
39411⭐ 4830🍴 kong - The Cloud-Native API Gateway.
23530⭐ 2980🍴 rancher - complete container management platform.
31225⭐ 2493🍴 portainer - making Docker management easy.
18614⭐ 3032🍴 nginx-proxy - automated nginx proxy for Docker containers using docker-gen.
6680⭐ 380🍴 bunkerized-nginx - nginx docker image "secure by default".
##### :black_small_square: Security
9180⭐ 1019🍴 docker-bench-security - checks for dozens of common best-practices around deploying Docker.
23893⭐ 2348🍴 trivy - vulnerability scanner for containers, suitable for CI.
🌎 Harbor - cloud native registry project that stores, signs, and scans content.
🌎 Houdini - hundreds of offensive and useful docker images for network intrusion.
##### :black_small_square: Manuals/Tutorials/Best Practices
22156⭐ 4646🍴 docker-cheat-sheet - a quick reference cheat sheet on Docker.
30617⭐ 3001🍴 awesome-docker - a curated list of Docker resources and projects.
24937⭐ 5736🍴 docker_practice - learn and understand Docker technologies, with real DevOps practice!
labs
- is a collection of tutorials for learning how to use Docker with various tools.
13721⭐ 2549🍴 dockerfiles - various Dockerfiles I use on the desktop and on servers.
41387⭐ 14150🍴 kubernetes-the-hard-way - bootstrap Kubernetes the hard way on Google Cloud Platform. No scripts.
127⭐ 13🍴 kubernetes-the-easy-way - bootstrap Kubernetes the easy way on Google Cloud Platform. No scripts.
2001⭐ 982🍴 cheatsheet-kubernetes-A4 - Kubernetes CheatSheets in A4.
710⭐ 71🍴 k8s-security - kubernetes security notes and best practices.
🌎 kubernetes-production-best-practices - checklists with best-practices for production-ready Kubernetes.
2694⭐ 252🍴 kubernetes-production-best-practices - kubernetes security - best practice guide.
6233⭐ 309🍴 kubernetes-failure-stories - is a compilation of public failure/horror stories related to Kubernetes.
#### Manuals/Howtos/Tutorials [[TOC]](#anger-table-of-contents)
##### :black_small_square: Shell/Command line
36624⭐ 3292🍴 pure-bash-bible - is a collection of pure bash alternatives to external processes.
6503⭐ 285🍴 pure-sh-bible - is a collection of pure POSIX sh alternatives to external processes.
11879⭐ 1027🍴 bash-guide - is a guide to learn bash.
5735⭐ 757🍴 bash-handbook - for those who wanna learn Bash.
🌎 The Bash Hackers Wiki - hold documentation of any kind about GNU Bash.
Shell & Utilities - describes the commands offered to application programs by POSIX-conformant systems.
153918⭐ 14578🍴 the-art-of-command-line - master the command line, in one page.
🌎 Shell Style Guide - a shell style guide for Google-originated open-source projects.
##### :black_small_square: Text Editors
🌎 Vim Cheat Sheet - great multi language vim guide.
##### :black_small_square: Python
🌎 Awesome Python - a curated list of awesome Python frameworks, libraries, software and resources.
36566⭐ 6481🍴 python-cheatsheet - comprehensive Python cheatsheet.
🌎 pythoncheatsheet.org - basic reference for beginner and advanced developers.
##### :black_small_square: Sed & Awk & Other
🌎 F’Awk Yeah! - advanced sed and awk usage (Parsing for Pentesters 3).
##### :black_small_square: \*nix & Network
🌎 nixCraft - linux and unix tutorials for new and seasoned sysadmin.
🌎 TecMint - the ideal Linux blog for Sysadmins & Geeks.
Omnisecu - free Networking, System Administration and Security tutorials.
834⭐ 151🍴 linux-cheat - Linux tutorials and cheatsheets. Minimal examples. Mostly user-land CLI utilities.
3392⭐ 595🍴 linuxupskillchallenge - learn the skills required to sysadmin.
Unix Toolbox - Unix/Linux/BSD commands and tasks which are useful for IT work or for advanced users.
🌎 Linux Kernel Teaching - is a collection of lectures and labs Linux kernel topics.
🌎 htop explained - explanation of everything you can see in htop/top on Linux.
🌎 Linux Guide and Hints - tutorials on system administration in Fedora and CentOS.
255⭐ 16🍴 strace-little-book - a little book which introduces strace.
1283⭐ 294🍴 linux-tracing-workshop - examples and hands-on labs for Linux tracing tools workshops.
2268⭐ 280🍴 http2-explained - a detailed document explaining and documenting HTTP/2.
2153⭐ 194🍴 http3-explained - a document describing the HTTP/3 and QUIC protocols.
🌎 HTTP/2 in Action - an excellent introduction to the new HTTP/2 standard.
🌎 Let's code a TCP/IP stack - great stuff to learn network and system programming at a deeper level.
13540⭐ 1087🍴 Nginx Admin's Handbook - how to improve NGINX performance, security and other important things.
27856⭐ 2052🍴 nginxconfig.io - NGINX config generator on steroids.
🌎 openssh guideline - is to help operational teams with the configuration of OpenSSH server and client.
🌎 SSH Handshake Explained - is a relatively brief description of the SSH handshake.
🌎 ISC's Knowledgebase - you'll find some general information about BIND 9, ISC DHCP, and Kea DHCP.
🌎 PacketLife.net - a place to record notes while studying for Cisco's CCNP certification.
##### :black_small_square: Microsoft
4426⭐ 1029🍴 AD-Attack-Defense - attack and defend active directory using modern post exploitation activity.
##### :black_small_square: Large-scale systems
278228⭐ 46602🍴 The System Design Primer - learn how to design large-scale systems.
59284⭐ 6073🍴 Awesome Scalability - best practices in building High Scalability, High Availability, High Stability, and more.
🌎 Web Architecture 101 - the basic architecture concepts.
##### :black_small_square: System hardening
🌎 CIS Benchmarks - secure configuration settings for over 100 technologies, available as a free PDF.
🌎 Security Harden CentOS 7 - this walks you through the steps required to security harden CentOS.
🌎 CentOS 7 Server Hardening Guide - great guide for hardening CentOS; familiar with OpenSCAP.
5524⭐ 585🍴 awesome-security-hardening - is a collection of security hardening guides, tools and other resources.
9953⭐ 617🍴 The Practical Linux Hardening Guide - provides a high-level overview of hardening GNU/Linux systems.
🌎 Linux Hardening Guide - how to harden Linux as much as possible for security and privacy.
##### :black_small_square: Security & Privacy
🌎 Hacking Articles - LRaj Chandel's Security & Hacking Blog.
8991⭐ 1527🍴 AWS security tools - make your AWS cloud environment more secure.
🌎 Rawsec's CyberSecurity Inventory - an inventory of tools and resources about CyberSecurity.
🌎 The Illustrated TLS Connection - every byte of a TLS connection explained and reproduced.
?⭐ ?🍴 SSL Research - SSL and TLS Deployment Best Practices by SSL Labs.
SELinux Game - learn SELinux by doing. Solve Puzzles, show skillz.
🌎 Certificates and PKI - everything you should know about certificates and PKI but are too afraid to ask.
🌎 The Art of Subdomain Enumeration - a reference for subdomain enumeration techniques.
🌎 Quitting Google - the comprehensive guide to quitting Google.
##### :black_small_square: Web Apps
🌎 OWASP - worldwide not-for-profit charitable organization focused on improving the security of software.
🌎 OWASP ASVS 3.0.1 - OWASP Application Security Verification Standard Project.
154⭐ 39🍴 OWASP ASVS 3.0.1 Web App - simple web app that helps developers understand the ASVS requirements.
2767⭐ 672🍴 OWASP ASVS 4.0 - is a list of application security requirements or tests.
🌎 OWASP Testing Guide v4 - includes a "best practice" penetration testing framework.
2045⭐ 384🍴 OWASP Dev Guide - this is the development version of the OWASP Developer Guide.
7382⭐ 1342🍴 OWASP WSTG - is a comprehensive open source guide to testing the security of web apps.
🌎 OWASP API Security Project - focuses specifically on the top ten vulnerabilities in API security.
🌎 Mozilla Web Security - help operational teams with creating secure web applications.
743⭐ 115🍴 security-bulletins - security bulletins that relate to Netflix Open Source.
22518⭐ 2602🍴 API-Security-Checklist - security countermeasures when designing, testing, and releasing your API.
🌎 Enable CORS - enable cross-origin resource sharing.
🌎 Application Security Wiki - is an initiative to provide all application security related resources at one place.
?⭐ ?🍴 Weird Proxies - reverse proxy related attacks; it is a result of analysis of various proxies.
🌎 Webshells - great series about malicious payloads.
🌎 Practical Web Cache Poisoning - show you how to compromise websites by using esoteric web features.
193⭐ 47🍴 Hidden directories and files - as a source of sensitive information about web application.
🌎 Explosive blog - great blog about cybersec and pentests.
🌎 Security Cookies - this paper will take a close look at cookie security.
1918⭐ 89🍴 APISecurityBestPractices - help you keep secrets (API keys, db credentials, certificates) out of source code.
##### :black_small_square: All-in-one
🌎 LZone Cheat Sheets - all cheat sheets.
13862⭐ 3597🍴 Dan’s Cheat Sheets’s - massive cheat sheets documentation.
🌎 Rico's cheatsheets - this is a modest collection of cheatsheets.
🌎 DevDocs API - combines multiple API documentations in a fast, organized, and searchable interface.
🌎 cheat.sh - the only cheat sheet you need.
🌎 gnulinux.guru - collection of cheat sheets about bash, vim and networking.
🌎 Web Skills - visual overview of useful skills to learn as a web developer.
##### :black_small_square: Ebooks
340812⭐ 61896🍴 free-programming-books - list of free learning resources in many languages.
##### :black_small_square: Other
🌎 CTF Series : Vulnerable Machines - the steps below could be followed to find vulnerabilities and exploits.
585⭐ 64🍴 50M_CTF_Writeup - $50 million CTF from Hackerone - writeup.
609⭐ 67🍴 ctf-tasks - an archive of low-level CTF challenges developed over the years.
🌎 How to start RE/malware analysis? - collection of some hints and useful links for the beginners.
The C10K problem - it's time for web servers to handle ten thousand clients simultaneously, don't you think?
🌎 How 1500 bytes became the MTU of the internet - great story about the Maximum Transmission Unit.
poor man's profiler - like dtrace's don't really provide methods to see what programs are blocking on.
🌎 HTTPS on Stack Overflow - this is the story of a long journey regarding the implementation of SSL.
🌎 Julia's Drawings - some drawings about programming and unix world, zines about systems & debugging tools.
3090⭐ 189🍴 Hash collisions - this great repository is focused on hash collisions exploitation.
3332⭐ 163🍴 sha256-animation - animation of the SHA-256 hash function in your terminal.
🌎 sha256algorithm - sha256 algorithm explained online step by step visually.
🌎 BGP Meets Cat - after 3072 hours of manipulating BGP, Job Snijders has succeeded in drawing a Nyancat.
425⭐ 17🍴 bgp-battleships - playing battleships over BGP.
40287⭐ 5551🍴 What happens when... - you type google.com into your browser and press enter?
16146⭐ 1729🍴 how-web-works - based on the 'What happens when...' repository.
🌎 HTTPS in the real world - great tutorial explain how HTTPS works in the real world.
🌎 Gitlab and NFS bug - how we spent two weeks hunting an NFS bug in the Linux kernel.
🌎 Gitlab melts down - postmortem on the database outage of January 31 2017 with the lessons we learned.
How To Become A Hacker - if you want to be a hacker, keep reading.
Operation Costs in CPU - should help to estimate costs of certain operations in CPU clocks.
🌎 Let's Build a Simple Database - writing a sqlite clone from scratch in C.
🌎 simple-computer - great resource to understand how computers work under the hood.
🌎 The story of "Have I been pwned?" - working with 154 million records on Azure Table Storage.
🌎 TOP500 Supercomputers - shows the 500 most powerful commercially available computer systems.
🌎 How to build a 8 GPU password cracker - hours of frustration like desktop components do.
🌎 CERN Data Centre - 3D visualizations of the CERN computing environments (and more).
How fucked is my database - evaluate how fucked your database is with this handy website.
🌎 Linux Troubleshooting 101 , 2016 Edition - everything is a DNS Problem...
🌎 Five Whys - you know what the problem is, but you cannot solve it?
🌎 Maersk, me & notPetya - how did ransomware successfully hijack hundreds of domain controllers?
🌎 howhttps.works - how HTTPS works ...in a comic!
🌎 howdns.works - a fun and colorful explanation of how DNS works.
🌎 POSTGRESQLCO.NF - your postgresql.conf documentation and recommendations.
#### Inspiring Lists [[TOC]](#anger-table-of-contents)
##### :black_small_square: SysOps/DevOps
23774⭐ 2886🍴 Awesome Sysadmin - amazingly awesome open source sysadmin resources.
33278⭐ 2383🍴 Awesome Shell - awesome command-line frameworks, toolkits, guides and gizmos.
10181⭐ 711🍴 Command-line-text-processing - finding text to search and replace, sorting to beautifying, and more.
3134⭐ 466🍴 Awesome Pcaptools - collection of tools developed by other researchers to process network traces.
4316⭐ 369🍴 awesome-ebpf - a curated list of awesome projects related to eBPF.
5472⭐ 504🍴 Linux Network Performance - where some of the network sysctl variables fit into the Linux/Kernel network flow.
10097⭐ 813🍴 Awesome Postgres - list of awesome PostgreSQL software, libraries, tools and resources.
4922⭐ 720🍴 quick-SQL-cheatsheet - a quick reminder of all SQL queries and examples on how to use them.
205533⭐ 9781🍴 Awesome-Selfhosted - list of Free Software network services and web applications which can be hosted locally.
🌎 List of applications - huge list of apps sorted by category, as a reference for those looking for packages.
18300⭐ 2566🍴 CS-Interview-Knowledge-Map - build the best interview map.
8227⭐ 1762🍴 DevOps-Guide - DevOps Guide from basic to advanced with Interview Questions and Notes.
🌎 FreeBSD Journal - it is a great list of periodical magazines about FreeBSD and other important things.
66875⭐ 14940🍴 devops-interview-questions - contains interview questions on various DevOps and SRE related topics.
##### :black_small_square: Developers
299884⭐ 39412🍴 Web Developer Roadmap - roadmaps, articles and resources to help you choose your path, learn and improve.
69124⭐ 6454🍴 Front-End-Checklist - the perfect Front-End Checklist for modern websites and meticulous developers.
16698⭐ 1221🍴 Front-End-Performance-Checklist - Front-End Performance Checklist that runs faster than the others.
🌎 Python's Magic Methods - what are magic methods? They're everything in object-oriented Python.
35870⭐ 2661🍴 wtfpython - a collection of surprising Python snippets and lesser-known features.
3976⭐ 265🍴 js-dev-reads - a list of books and articles for the discerning web developer to read.
6726⭐ 341🍴 Commit messages guide - a guide to understand the importance of commit messages.
##### :black_small_square: Security/Pentesting
11506⭐ 1681🍴 Awesome Web Security - a curated list of Web Security materials and resources.
3692⭐ 479🍴 awesome-cyber-skills - a curated list of hacking environments where you can train your cyber skills.
4656⭐ 973🍴 awesome-devsecops - an authoritative list of awesome devsecops tools.
19242⭐ 2842🍴 awesome-osint - is a curated list of amazingly awesome OSINT.
1820⭐ 301🍴 HolyTips - tips and tutorials on Bug Bounty Hunting and Web App Security.
8182⭐ 1491🍴 awesome-threat-intelligence - a curated list of Awesome Threat Intelligence resources.
9138⭐ 2208🍴 Red-Teaming-Toolkit - a collection of open source and commercial tools that aid in red team operations.
3011⭐ 593🍴 awesome-burp-extensions - a curated list of amazingly awesome Burp Extensions.
4345⭐ 1040🍴 Free Security eBooks - list of a Free Security and Hacking eBooks.
5586⭐ 1167🍴 Hacking-Security-Ebooks - top 100 Hacking & Security E-Books.
1958⭐ 98🍴 privacy-respecting - curated list of privacy respecting services and software.
8973⭐ 1069🍴 reverse-engineering - list of awesome reverse engineering resources.
1994⭐ 363🍴 linux-re-101 - a collection of resources for linux reverse engineering.
2359⭐ 327🍴 reverseengineering-reading-list - a list of Reverse Engineering articles, books, and papers.
6357⭐ 1063🍴 Awesome-WAF - a curated list of awesome web-app firewall (WAF) stuff.
5903⭐ 887🍴 awesome-shodan-queries - interesting, funny, and depressing search queries to plug into shodan.io.
1431⭐ 304🍴 RobotsDisallowed - a curated list of the most common and most interesting robots.txt disallowed directories.
2557⭐ 299🍴 HackingNeuralNetworks - is a small course on exploiting and defending neural networks.
🌎 wildcard-certificates - why you probably shouldn't use a wildcard certificate.
🌎 Don't use VPN services - which is what every third-party "VPN provider" does.
3578⭐ 492🍴 awesome-yara - a curated list of awesome YARA rules, tools, and people.
21339⭐ 1454🍴 macOS-Security-and-Privacy-Guide - guide to securing and improving privacy on macOS.
1802⭐ 204🍴 macos_security - macOS Security Compliance Project.
4054⭐ 488🍴 awesome-sec-talks - is a collected list of awesome security talks.
10636⭐ 894🍴 Movies for Hackers - list of movies every hacker & cyberpunk must watch.
35⭐ 10🍴 Cryptography_1 - materials used whilst taking Prof. Dan Boneh Stanford Crypto course.
1500⭐ 259🍴 Crypton - library to learn and practice Offensive and Defensive Cryptography.
##### :black_small_square: Other
🌎 Cheatography - over 3,000 free cheat sheets, revision aids and quick references.
13404⭐ 1360🍴 awesome-static-analysis - static analysis tools for all programming languages.
172951⭐ 21864🍴 computer-science - path to a free self-taught education in Computer Science.
11323⭐ 436🍴 post-mortems - is a collection of postmortems (config errors, hardware failures, and more).
315484⭐ 29260🍴 build-your-own-x - build your own (insert technology here).
?⭐ ?🍴 Project-Based-Tutorials-in-C - is a curated list of project-based tutorials in C.
5608⭐ 764🍴 The-Documentation-Compendium - various README templates & tips on writing high-quality documentation.
16796⭐ 2683🍴 awesome-python-applications - free software that works great, and also happens to be open-source Python.
61254⭐ 9947🍴 awesome-public-datasets - a topic-centric list of HQ open datasets.
294⭐ 43🍴 machine-learning-algorithms - a curated list of all machine learning algorithms and concepts.
#### Blogs/Podcasts/Videos [[TOC]](#anger-table-of-contents)
##### :black_small_square: SysOps/DevOps
🌎 Varnish for PHP developers - very interesting presentation of Varnish by Mattias Geniar.
🌎 A Netflix Guide to Microservices - talks about the chaotic and vibrant world of microservices at Netflix.
##### :black_small_square: Developers
🌎 Comparing C to machine lang - compare a simple C app with the compiled machine code of that program.
##### :black_small_square: Geeky Persons
Brendan Gregg's Blog - is an industry expert in computing performance and cloud computing.
🌎 Gynvael "GynDream" Coldwind - is a IT security engineer at Google.
Michał "lcamtuf" Zalewski - white hat hacker, computer security expert.
🌎 Mattias Geniar - developer, sysadmin, blogger, podcaster and public speaker.
🌎 Nick Craver - software developer and systems administrator for Stack Exchange.
🌎 Scott Helme - security researcher, speaker and founder of securityheaders.com and report-uri.com.
🌎 Brian Krebs - The Washington Post and now an Independent investigative journalist.
🌎 Bruce Schneier - is an internationally renowned security technologist, called a "security guru".
🌎 Chrissy Morgan - advocate of practical learning, Chrissy also takes part in bug bounty programs.
🌎 Andy Gill - is a hacker at heart who works as a senior penetration tester.
🌎 Daniel Miessler - cybersecurity expert and writer.
🌎 Samy Kamkar - is an American privacy and security researcher, computer hacker.
🌎 Javvad Malik - is a security advocate at AlienVault, a blogger event speaker and industry commentator.
🌎 Graham Cluley - public speaker and independent computer security analyst.
🌎 Kacper Szurek - detection engineer at ESET.
🌎 Troy Hunt - web security expert known for public education and outreach on security topics.
🌎 raymii.org - sysadmin specializing in building high availability cloud environments.
🌎 Robert Penz - IT security expert.
##### :black_small_square: Geeky Blogs
🌎 Linux Audit - the Linux security blog about auditing, hardening and compliance by Michael Boelen.
Linux Security Expert - trainings, howtos, checklists, security tools, and more.
The Grymoire - collection of useful incantations for wizards, be you computer wizards, magicians, or whatever.
🌎 Secjuice - is the only non-profit, independent and volunteer led publication in the information security space.
🌎 Decipher - security news that informs and inspires.
##### :black_small_square: Geeky Vendor Blogs
🌎 Tenable Podcast - conversations and interviews related to Cyber Exposure, and more.
🌎 Sophos - threat news room, giving you news, opinion, advice and research on computer security issues.
🌎 Tripwire State of Security - blog featuring the latest news, trends and insights on current security issues.
🌎 Malwarebytes Labs Blog - security blog aims to provide insider news about cybersecurity.
🌎 TrustedSec - latest news, and trends about cybersecurity.
🌎 PortSwigger Web Security Blog - about web app security vulns and top tips from our team of web security.
🌎 AT&T Cybersecurity blog - news on emerging threats and practical advice to simplify threat detection.
🌎 Thycotic - where CISOs and IT Admins come to learn about industry trends, IT security, and more.
##### :black_small_square: Geeky Cybersecurity Podcasts
🌎 Risky Business - is a weekly information security podcast featuring news and in-depth interviews.
🌎 Cyber, by Motherboard - stories, and focus on the ideas about cybersecurity.
🌎 Tenable Podcast - conversations and interviews related to Cyber Exposure, and more.
Cybercrime Investigations - podcast by Geoff White about cybercrimes.
🌎 The many hats club - featuring stories from a wide range of Infosec people (Whitehat, Greyhat and Blackhat).
🌎 Darknet Diaries - true stories from the dark side of the Internet.
🌎 OSINTCurious Webcasts - is the investigative curiosity that helps people be successful in OSINT.
🌎 Security Weekly - the latest information security and hacking news.
##### :black_small_square: Geeky Cybersecurity Video Blogs
🌎 rev3rse security - offensive, binary exploitation, web app security, hardening, red team, blue team.
🌎 LiveOverflow - a lot more advanced topics than what is typically offered in paid online courses - but for free.
🌎 J4vv4D - the important information regarding our internet security.
CyberTalks - talks, interviews, and article about cybersecurity.
##### :black_small_square: Best Personal Twitter Accounts
🌎 @blackroomsec - a white-hat hacker/pentester. Intergalactic Minesweeper Champion 1990.
🌎 @MarcoCiappelli - Co-Founder @ITSPmagazine, at the intersection of IT security and society.
🌎 @binitamshah - Linux Evangelist. Malwares. Kernel Dev. Security Enthusiast.
🌎 @joe_carson - an InfoSec Professional and Tech Geek.
🌎 @mikko - CRO at F-Secure, Reverse Engineer, TED Speaker, Supervillain.
🌎 @esrtweet - often referred to as ESR, is an American software developer, and open-source software advocate.
🌎 @gynvael - security researcher/programmer, @DragonSectorCTF founder/player, technical streamer.
🌎 @x0rz - Security Researcher & Cyber Observer.
🌎 @hasherezade - programmer, malware analyst. Author of PEbear, PEsieve, libPeConv.
🌎 @TinkerSec - tinkerer, cypherpunk, hacker.
🌎 @alisaesage - independent hacker and researcher.
🌎 @SwiftOnSecurity - systems security, industrial safety, sysadmin, author of decentsecurity.com.
🌎 @dakami - is one of just seven people with the authority to restore the DNS root keys.
🌎 @samykamkar - is a famous "grey hat" hacker, security researcher, creator of the MySpace "Samy" worm.
🌎 @securityweekly - founder & CTO of Security Weekly podcast network.
🌎 @jack_daniel - @SecurityBSides co-founder.
🌎 @thegrugq - Security Researcher.
🌎 @matthew_d_green - a cryptographer and professor at Johns Hopkins University.
##### :black_small_square: Best Commercial Twitter Accounts
🌎 @haveibeenpwned - check if you have an account that has been compromised in a data breach.
🌎 @bugcrowd - trusted by more of the Fortune 500 than any other crowdsourced security platform.
🌎 @Malwarebytes - most trusted security company. Unmatched threat visibility.
🌎 @sansforensics - the world's leading Digital Forensics and Incident Response provider.
🌎 @attcyber - AT&T Cybersecurity’s Edge-to-Edge technologies provide threat intelligence, and more.
🌎 @TheManyHatsClub - an information security focused podcast and group of individuals from all walks of life.
🌎 @hedgehogsec - Hedgehog Cyber. Gibraltar and Manchester's top boutique information security firm.
🌎 @NCSC - the National Cyber Security Centre. Helping to make the UK the safest place to live and work online.
🌎 @Synacktiv - IT security experts.
##### :black_small_square: A piece of history
How to Do Things at ARL - how to configure modems, scan images, record CD-ROMs, and other.*
##### :black_small_square: Other
🌎 Diffie-Hellman Key Exchange (short version) - how Diffie-Hellman Key Exchange worked.
#### Hacking/Penetration Testing [[TOC]](#anger-table-of-contents)
##### :black_small_square: Pentesters arsenal tools
Sandcat Browser - a penetration-oriented browser with plenty of advanced functionality already built in.
🌎 Metasploit - tool and framework for pentesting system, web and many more.
🌎 Burp Suite - tool for testing web app security, intercepting proxy to replay, inject, scan and fuzz.
🌎 OWASP Zed Attack Proxy - intercepting proxy to replay, inject, scan and fuzz HTTP requests.
w3af - is a Web Application Attack and Audit Framework.
🌎 mitmproxy - an interactive TLS-capable intercepting HTTP proxy for penetration testers.
🌎 Nikto2 - web server scanner which performs comprehensive tests against web servers for multiple items.
sqlmap - tool that automates the process of detecting and exploiting SQL injection flaws.
4143⭐ 652🍴 Recon-ng - is a full-featured Web Reconnaissance framework written in Python.
5191⭐ 880🍴 AutoRecon - is a network reconnaissance tool which performs automated enumeration of services.
🌎 Faraday - an Integrated Multiuser Pentest Environment.
11101⭐ 1526🍴 Photon - incredibly fast crawler designed for OSINT.
13415⭐ 1912🍴 XSStrike - most advanced XSS detection suite.
8164⭐ 1854🍴 Sn1per - automated pentest framework for offensive security experts.
11008⭐ 1164🍴 vuls - is an agent-less vulnerability scanner for Linux, FreeBSD, and other.
8287⭐ 896🍴 tsunami - is a general purpose network security scanner with an extensible plugin system.
5657⭐ 880🍴 aquatone - a tool for domain flyovers.
?⭐ ?🍴 BillCipher - information gathering tool for a website or IP address.
2677⭐ 449🍴 WhatWaf - detect and bypass web application firewalls and protection systems.
1382⭐ 182🍴 Corsy - CORS misconfiguration scanner.
3098⭐ 400🍴 Raccoon - is a high performance offensive security tool for reconnaissance and vulnerability scanning.
1774⭐ 255🍴 dirhunt - find web directories without bruteforce.
🌎 John The Ripper - is a fast password cracker, currently available for many flavors of Unix, Windows, and other.
🌎 hashcat - world's fastest and most advanced password recovery utility.
p0f - is a tool to identify the players behind any incidental TCP/IP communications.
790⭐ 105🍴 ssh_scan - a prototype SSH configuration and policy scanner.
1313⭐ 309🍴 LeakLooker - find open databases - powered by Binaryedge.io
7744⭐ 1880🍴 exploitdb - searchable archive from The Exploit Database.
1731⭐ 241🍴 getsploit - is a command line utility for searching and downloading exploits.
8558⭐ 1898🍴 ctf-tools - some setup scripts for security research tools.
12171⭐ 1720🍴 pwntools - CTF framework and exploit development library.
863⭐ 178🍴 security-tools - collection of small security tools created mostly in Python. CTFs, pentests and so on.
610⭐ 249🍴 pentestpackage - is a package of Pentest scripts.
2722⭐ 786🍴 python-pentest-tools - python tools for penetration testers.
8269⭐ 2102🍴 fuzzdb - dictionary of attack patterns and primitives for black-box application fault injection.
3747⭐ 644🍴 AFL - is a free software fuzzer maintained by Google.
5273⭐ 1052🍴 AFL++ - is AFL with community patches.
5406⭐ 1228🍴 syzkaller - is an unsupervised, coverage-guided kernel fuzzer.
7711⭐ 896🍴 pwndbg - exploit development and reverse engineering with GDB made easy.
5904⭐ 807🍴 GDB PEDA - Python Exploit Development Assistance for GDB.
🌎 IDA - multi-processor disassembler and debugger useful for reverse engineering malware.
20812⭐ 3017🍴 radare2 - framework for reverse-engineering and analyzing binaries.
12238⭐ 2316🍴 routersploit - exploitation framework for embedded devices.
52260⭐ 5917🍴 Ghidra - is a software reverse engineering (SRE) framework.
🌎 Cutter - is an SRE platform integrating Ghidra's decompiler.
593⭐ 152🍴 Vulnreport - open-source pentesting management and automation platform by Salesforce Product Security.
1816⭐ 244🍴 Mentalist - is a graphical tool for custom wordlist generation.
2299⭐ 504🍴 archerysec - vulnerability assessment and management helps to perform scans and manage vulnerabilities.
5378⭐ 882🍴 Osmedeus - fully automated offensive security tool for reconnaissance and vulnerability scanning.
9893⭐ 2189🍴 beef - the browser exploitation framework project.
5043⭐ 1131🍴 AutoSploit - automated mass exploiter.
2252⭐ 255🍴 SUDO_KILLER - is a tool to identify and exploit sudo rules' misconfigurations and vulnerabilities.
8343⭐ 1449🍴 yara - the pattern matching swiss knife.
19526⭐ 3754🍴 mimikatz - a little tool to play with Windows security.
60796⭐ 6992🍴 sherlock - hunt down social media accounts by username across social networks.
🌎 OWASP Threat Dragon - is a tool used to create threat model diagrams and to record possible threats.
##### :black_small_square: Pentests bookmarks collection
PTES - the penetration testing execution standard.
🌎 Pentests MindMap - amazing mind map with vulnerable apps and systems.
🌎 WebApps Security Tests MindMap - incredible mind map for WebApps security tests.
🌎 Brute XSS - master the art of Cross Site Scripting.
🌎 XSS cheat sheet - contains many vectors that can help you bypass WAFs and filters.
🌎 Offensive Security Bookmarks - security bookmarks collection, all things that author need to pass OSCP.
3903⭐ 772🍴 Awesome Pentest Cheat Sheets - collection of the cheat sheets useful for pentesting.
86186⭐ 8987🍴 Awesome Hacking by HackWithGithub - awesome lists for hackers, pentesters and security researchers.
13252⭐ 1550🍴 Awesome Hacking by carpedm20 - a curated list of awesome hacking tutorials, tools and resources.
15411⭐ 2115🍴 Awesome Hacking Resources - collection of hacking/penetration testing resources to make you better.
22026⭐ 4487🍴 Awesome Pentest - collection of awesome penetration testing resources, tools and other shiny things.
?⭐ ?🍴 Awesome-Hacking-Tools - is a curated list of awesome Hacking Tools.
291⭐ 84🍴 Hacking Cheat Sheet - author hacking and pentesting notes.
3924⭐ 1145🍴 blackhat-arsenal-tools - official Black Hat arsenal security tools repository.
🌎 Penetration Testing and WebApp Cheat Sheets - the complete list of Infosec related cheat sheets.
19144⭐ 3459🍴 Cyber Security Resources - includes thousands of cybersecurity-related references and resources.
1039⭐ 360🍴 Pentest Bookmarks - there are a LOT of pentesting blogs.
4918⭐ 1232🍴 Cheatsheet-God - Penetration Testing Reference Bank - OSCP/PTP & PTX Cheatsheet.
4039⭐ 813🍴 ThreatHunter-Playbook - to aid the development of techniques and hypothesis for hunting campaigns.
5829⭐ 1616🍴 Beginner-Network-Pentesting - notes for beginner network pentesting course.
2496⭐ 734🍴 OSCPRepo - is a list of resources that author have been gathering in preparation for the OSCP.
61724⭐ 14737🍴 PayloadsAllTheThings - a list of useful payloads and bypass for Web Application Security and Pentest/CTF.
3634⭐ 968🍴 payloads - git all the Payloads! A collection of web attack payloads.
3025⭐ 648🍴 command-injection-payload-list - command injection payload list.
5903⭐ 887🍴 Awesome Shodan Search Queries - great search queries to plug into Shodan.
4793⭐ 767🍴 AwesomeXSS - is a collection of Awesome XSS resources.
1888⭐ 776🍴 php-webshells - common php webshells.
🌎 Pentesting Tools Cheat Sheet - a quick reference high level overview for typical penetration testing.
🌎 OWASP Cheat Sheet Series - is a collection of high value information on specific application security topics.
🌎 OWASP dependency-check - is an open source solution the OWASP Top 10 2013 entry.
🌎 OWASP ProActive Controls - OWASP Top 10 Proactive Controls 2018.
12942⭐ 2350🍴 PENTESTING-BIBLE - hacking & penetration testing & red team & cyber security resources.
3483⭐ 919🍴 pentest-wiki - is a free online security knowledge library for pentesters/researchers.
🌎 DEF CON Media Server - great stuff from DEFCON.
12033⭐ 2577🍴 Awesome Malware Analysis - a curated list of awesome malware analysis tools and resources.
🌎 SQL Injection Cheat Sheet - detailed technical stuff about the many different variants of the SQL Injection.
Entersoft Knowledge Base - great and detailed reference about vulnerabilities.
HTML5 Security Cheatsheet - a collection of HTML5 related XSS attack vectors.
XSS String Encoder - for generating XSS code to check your input validation filters against XSS.
🌎 GTFOBins - list of Unix binaries that can be exploited by an attacker to bypass local security restrictions.
🌎 Guifre Ruiz Notes - collection of security, system, network and pentest cheatsheets.
SSRF Tips - a collection of SSRF Tips.
shell-storm repo CTF - great archive of CTFs.
529⭐ 93🍴 ctf - CTF (Capture The Flag) writeups, code snippets, notes, scripts.
2690⭐ 475🍴 My-CTF-Web-Challenges - collection of CTF Web challenges.
11798⭐ 2346🍴 MSTG - The Mobile Security Testing Guide (MSTG) is a comprehensive manual for mobile app security testing.
?⭐ ?🍴 Internal-Pentest-Playbook - notes on the most common things for an Internal Network Penetration Test.
5150⭐ 1054🍴 KeyHacks - shows quick ways in which API keys leaked by a bug bounty program can be checked.
150⭐ 29🍴 securitum/research - various Proof of Concepts of security research performed by Securitum.
8543⭐ 1962🍴 public-pentesting-reports - is a list of public pentest reports released by several consulting security groups.
4693⭐ 922🍴 awesome-bug-bounty - is a comprehensive curated list of available Bug Bounty.
3768⭐ 990🍴 bug-bounty-reference - is a list of bug bounty write-ups.
4749⭐ 1022🍴 Awesome-Bugbounty-Writeups - is a curated list of bugbounty writeups.
🌎 Bug bounty writeups - list of bug bounty writeups (2012-2020).
🌎 hackso.me - a great journey into security.
##### :black_small_square: Backdoors/exploits
2208⭐ 466🍴 PHP-backdoors - a collection of PHP backdoors. For educational or testing purposes only.
##### :black_small_square: Wordlists and Weak passwords
🌎 Weakpass - for any kind of bruteforce find wordlists or unleash the power of them all at once!
🌎 Hashes.org - is a free online hash resolving service incorporating many unparalleled techniques.
58992⭐ 23967🍴 SecLists - collection of multiple types of lists used during security assessments, collected in one place.
8710⭐ 1612🍴 Probable-Wordlists - sorted by probability originally created for password generation and testing.
🌎 skullsecurity passwords - password dictionaries and leaked passwords repository.
🌎 Polish PREMIUM Dictionary - official dictionary created by the team on the forum bezpieka.org.* 1
973⭐ 132🍴 statistically-likely-usernames - wordlists for creating statistically likely username lists.
##### :black_small_square: Bounty platforms
🌎 YesWeHack - bug bounty platform with infosec jobs.
🌎 Openbugbounty - allows any security researcher reporting a vulnerability on any website.
🌎 hackerone - global hacker community to surface the most relevant security issues.
🌎 bugcrowd - crowdsourced cybersecurity for the enterprise.
🌎 Crowdshield - crowdsourced security & bug bounty management.
🌎 Synack - crowdsourced security & bug bounty programs, crowd security intelligence platform, and more.
🌎 Hacktrophy - bug bounty platform.
##### :black_small_square: Web Training Apps (local installation)
🌎 OWASP-VWAD - comprehensive and well maintained registry of all known vulnerable web applications.
DVWA - PHP/MySQL web application that is damn vulnerable.
🌎 metasploitable2 - vulnerable web application amongst security researchers.
4790⭐ 1152🍴 metasploitable3 - is a VM that is built from the ground up with a large amount of security vulnerabilities.
788⭐ 320🍴 DSVW - is a deliberately vulnerable web application written in under 100 lines of code.
🌎 OWASP Mutillidae II - free, open source, deliberately vulnerable web-application.
🌎 OWASP Juice Shop Project - the most bug-free vulnerable application in existence.
🌎 OWASP Node js Goat Project - OWASP Top 10 security risks apply to web apps developed using Node.js.
275⭐ 132🍴 juicy-ctf - run Capture the Flags and Security Trainings with OWASP Juice Shop.
1351⭐ 461🍴 SecurityShepherd - web and mobile application security training platform.
226⭐ 62🍴 Security Ninjas - open source application security training program.
973⭐ 323🍴 hackazon - a modern vulnerable web app.
709⭐ 714🍴 dvna - damn vulnerable NodeJS application.
3746⭐ 1561🍴 django-DefectDojo - is an open-source application vulnerability correlation and security orchestration tool.
🌎 Google Gruyere - web application exploits and defenses.
117⭐ 17🍴 Bodhi - is a playground focused on learning the exploitation of client-side web vulnerabilities.
🌎 Websploit - single vm lab with the purpose of combining several vulnerable appliations in one environment.
17916⭐ 4494🍴 vulhub - pre-built Vulnerable Environments based on docker-compose.
🌎 CloudGoat 2 - the new & improved "Vulnerable by Design"
AWS deployment tool.
904⭐ 438🍴 secDevLabs - is a laboratory for learning secure web development in a practical manner.
189⭐ 42🍴 CORS-vulnerable-Lab - sample vulnerable code and its exploit code.
939⭐ 301🍴 RootTheBox - a Game of Hackers (CTF Scoreboard & Game Manager).
🌎 KONTRA - application security training (OWASP Top Web & Api).
##### :black_small_square: Labs (ethical hacking platforms/trainings/CTFs)
🌎 Offensive Security - true performance-based penetration testing training for over a decade.
🌎 Hack The Box - online platform allowing you to test your penetration testing skills.
🌎 Hacking-Lab - online ethical hacking, computer network and security challenge platform.
pwnable.kr - non-commercial wargame site which provides various pwn challenges.
🌎 Pwnable.tw - is a wargame site for hackers to test and expand their binary exploiting skills.
🌎 picoCTF - is a free computer security game targeted at middle and high school students.
🌎 CTFlearn - is an online platform built to help ethical hackers learn and practice their cybersecurity knowledge.
🌎 ctftime - CTF archive and a place, where you can get some another CTF-related info.
🌎 Silesia Security Lab - high quality security testing services.
🌎 Practical Pentest Labs - pentest lab, take your Hacking skills to the next level.
🌎 Root Me - the fast, easy, and affordable way to train your hacking skills.
🌎 rozwal.to - a great platform to train your pentesting skills.
🌎 TryHackMe - learning Cyber Security made easy.
🌎 hackxor - is a realistic web application hacking game, designed to help players of all abilities develop their skills.
Hack Yourself First - it's full of nasty app sec holes.
OverTheWire - can help you to learn and practice security concepts in the form of fun-filled games.
🌎 Wizard Labs - is an online Penetration Testing Lab.
🌎 PentesterLab - provides vulnerable systems that can be used to test and understand vulnerabilities.
🌎 RingZer0 - tons of challenges designed to test and improve your hacking skills.
try2hack - several security-oriented challenges for your entertainment.
🌎 Ubeeri - preconfigured lab environments.
🌎 Pentestit - emulate IT infrastructures of real companies for legal pen testing and improving pentest skills.
🌎 Microcorruption - reversal challenges done in the web interface.
🌎 Crackmes - download crackmes to help improve your reverse engineering skills.
🌎 DomGoat - DOM XSS security learning and practicing platform.
🌎 Stereotyped Challenges - upgrade your web hacking techniques today!
🌎 Vulnhub - allows anyone to gain practical 'hands-on' experience in digital security.
🌎 W3Challs - is a penetration testing training platform, which offers various computer challenges.
🌎 RingZer0 CTF - offers you tons of challenges designed to test and improve your hacking skills.
🌎 Hack.me - a platform where you can build, host and share vulnerable web apps for educational purposes.
🌎 HackThis! - discover how hacks, dumps and defacements are performed and secure your website.
🌎 Enigma Group WebApp Training - these challenges cover the exploits listed in the OWASP Top 10 Project.
🌎 Reverse Engineering Challenges - challenges, exercises, problems and tasks - by level, by type, and more.
🌎 0x00sec - the home of the Hacker - Malware, Reverse Engineering, and Computer Science.
🌎 We Chall - there are exist a lots of different challenge types.
🌎 Hacker Gateway - is the go-to place for hackers who want to test their skills.
🌎 Hacker101 - is a free class for web security.
🌎 contained.af - a stupid game for learning about containers, capabilities, and syscalls.
flAWS challenge! - a series of levels you'll learn about common mistakes and gotchas when using AWS.
🌎 CyberSec WTF - provides web hacking challenges derived from bounty write-ups.
🌎 CTF Challenge - CTF Web App challenges.
🌎 gCTF - most of the challenges used in the Google CTF 2017.
🌎 Hack This Site - is a free, safe and legal training ground for hackers.
🌎 Attack & Defense - is a browser-based cloud labs.
🌎 Cryptohack - a fun platform for learning modern cryptography.
🌎 Cryptopals - the cryptopals crypto challenges.
##### :black_small_square: CTF platforms
6535⭐ 1314🍴 fbctf - platform to host Capture the Flag competitions.
168⭐ 60🍴 ctfscoreboard - scoreboard for Capture The Flag competitions.
##### :black_small_square: Other resources
2636⭐ 556🍴 Bugcrowd University - open source education content for the researcher community.
2496⭐ 734🍴 OSCPRepo - a list of resources and scripts that I have been gathering in preparation for the OSCP.
🌎 OWASP Top 10: Real-World Examples - test your web apps with real-world examples (two-part series).
phrack.org - an awesome collection of articles from several respected hackers and other thinkers.
5521⭐ 1388🍴 Practical-Ethical-Hacking-Resources - compilation of resources from TCM's Udemy Course.
#### Your daily knowledge and news [[TOC]](#anger-table-of-contents)
##### :black_small_square: RSS Readers
🌎 Feedly - organize, read and share what matters to you.
🌎 Inoreader - similar to feedly with a support for filtering what you fetch from rss.
##### :black_small_square: IRC Channels
🌎 #hackerspaces - hackerspace IRC channels.
##### :black_small_square: Security
🌎 The Hacker News - leading news source dedicated to promoting awareness for security experts and hackers.
🌎 Latest Hacking News - provides the latest hacking news, exploits and vulnerabilities for ethical hackers.
🌎 Security Newsletter - security news as a weekly digest (email notifications).
🌎 Google Online Security Blog - the latest news and insights from Google on security and safety on the Internet.
🌎 Qualys Blog - expert network security guidance and news.
🌎 DARKReading - connecting the Information Security Community.
🌎 Darknet - latest hacking tools, hacker news, cybersecurity best practices, ethical hacking & pen-testing.
🌎 publiclyDisclosed - public disclosure watcher who keeps you up to date about the recently disclosed bugs.
🌎 Reddit - Hacking - a subreddit dedicated to hacking and hackers.
🌎 Packet Storm - information security services, news, files, tools, exploits, advisories and whitepapers.
🌎 Sekurak - about security, penetration tests, vulnerabilities and many others (PL/EN).
🌎 nf.sec - basic aspects and mechanisms of Linux operating system security (PL).
##### :black_small_square: Other/All-in-one
🌎 Changelog - is a community of hackers; news & podcasts for developers and hackers.
#### Other Cheat Sheets [[TOC]](#anger-table-of-contents)
###### Build your own DNS Servers
🌎 Unbound DNS Tutorial - a validating, recursive, and caching DNS server.
🌎 Knot Resolver on Fedora - how to get faster and more secure DNS resolution with Knot Resolver on Fedora.
🌎 DNS-over-HTTPS - tutorial to setup your own DNS-over-HTTPS (DoH) server.
🌎 dns-over-https - a cartoon intro to DNS over HTTPS.
🌎 DNS-over-TLS - following to your DoH server, setup your DNS-over-TLS (DoT) server.
🌎 DNS Servers - how (and why) i run my own DNS Servers.
###### Build your own Certificate Authority
🌎 OpenSSL Certificate Authority - build your own certificate authority (CA) using the OpenSSL tools.
6836⭐ 447🍴 step-ca Certificate Authority - build your own certificate authority (CA) using open source step-ca.
###### Build your own System/Virtual Machine
27365⭐ 3313🍴 os-tutorial - how to create an OS from scratch.
🌎 Write your Own Virtual Machine - how to write your own virtual machine (VM).
4850⭐ 408🍴 x86 Bare Metal Examples - dozens of minimal operating systems to learn x86 system programming.
1898⭐ 159🍴 simple-computer - the scott CPU from "But How Do It Know?" by J. Clark Scott.
🌎 littleosbook - the little book about OS development.
###### DNS Servers list (privacy)
| IP | URL |
| :--- | :--- |
| **`84.200.69.80`** | 🌎 [dns.watch](dns.watch/) |
| **`94.247.43.254`** | 🌎 [opennic.org](www.opennic.org/) |
| **`64.6.64.6`** | 🌎 [verisign.com](www.verisign.com/en_US/security-services/public-dns/index.xhtml) |
| **`89.233.43.71`** | 🌎 [censurfridns.dk](blog.uncensoreddns.org/) |
| **`1.1.1.1`** | 🌎 [cloudflare.com](1.1.1.1/) |
| **`94.130.110.185`** | 🌎 [dnsprivacy.at](dnsprivacy.at/) |
###### TOP Browser extensions
| Extension name | Description |
| :--- | :--- |
| **`IPvFoo`** | Display the server IP address and HTTPS information across all page elements. |
| **`FoxyProxy`** | Simplifies configuring browsers to access proxy-servers. |
| **`HTTPS Everywhere`** | Automatically use HTTPS security on many sites. |
| **`uMatrix`** | Point & click to forbid/allow any class of requests made by your browser. |
| **`uBlock Origin`** | An efficient blocker: easy on memory and CPU footprint. |
| **`Session Buddy`** | Manage browser tabs and bookmarks with ease. |
| **`SuperSorter`** | Sort bookmarks recursively, delete duplicates, merge folders, and more. |
| **`Clear Cache`** | Clear your cache and browsing data. |
| **`d3coder`** | Encoding/Decoding plugin for various types of encoding. |
| **`Web Developer`** | Adds a toolbar button with various web developer tools. |
| **`ThreatPinch Lookup`** | Add threat intelligence hover tool tips. |
###### TOP Burp extensions
| Extension name | Description |
| :--- | :--- |
| **`Active Scan++`** | Extends Burp's active and passive scanning capabilities. |
| **`Autorize`** | Automatically detects authorization enforcement. |
| **`AuthMatrix`** | A simple matrix grid to define the desired levels of access privilege. |
| **`Logger++`** | Logs requests and responses for all Burp tools in a sortable table. |
| **`Bypass WAF`** | Adds headers useful for bypassing some WAF devices. |
| **`JSON Beautifier`** | Beautifies JSON content in the HTTP message viewer. |
| **`JSON Web Tokens`** | Enables Burp to decode and manipulate JSON web tokens. |
| **`CSP Auditor`** | Displays CSP headers for responses, and passively reports CSP weaknesses. |
| **`CSP-Bypass`** | Passively scans for CSP headers that contain known bypasses. |
| **`Hackvertor`** | Converts data using a tag-based configuration to apply various encoding. |
| **`HTML5 Auditor`** | Scans for usage of risky HTML5 features. |
| **`Software Vulnerability Scanner`** | Vulnerability scanner based on vulners.com audit API. |
| **`Turbo Intruder`** | Is a powerful bruteforcing tool. |
| **`Upload Scanner`** | Upload a number of different file types, laced with different forms of payload. |
###### Hack Mozilla Firefox address bar
In Firefox's address bar, you can limit results by typing special characters before or after your term:
- `^` - for matches in your browsing history
- `*` - for matches in your bookmarks.
- `%` - for matches in your currently open tabs.
- `#` - for matches in page titles.
- `@` - for matches in web addresses.
###### Chrome hidden commands
- `chrome://chrome-urls` - list of all commands
- `chrome://flags` - enable experiments and development features
- `chrome://interstitials` - errors and warnings
- `chrome://net-internals` - network internals (events, dns, cache)
- `chrome://network-errors` - network errors
- `chrome://net-export` - start logging future network activity to a file
- `chrome://safe-browsing` - safe browsing options
- `chrome://user-actions` - record all user actions
- `chrome://restart` - restart chrome
- `chrome://dino` - ERR_INTERNET_DISCONNECTED...
- `cache:` - view the cached version of the web page
###### Bypass WAFs by Shortening IP Address (by 🌎 [0xInfection](twitter.com/0xInfection))
IP addresses can be shortened by dropping the zeroes:
```
http://1.0.0.1 → http://1.1
http://127.0.0.1 → http://127.1
http://192.168.0.1 → http://192.168.1
http://0xC0A80001 or http://3232235521 → 192.168.0.1
http://192.168.257 → 192.168.1.1
http://192.168.516 → 192.168.2.4
```
> This bypasses WAF filters for SSRF, open-redirect, etc where any IP as input gets blacklisted.
For more information please see [How to Obscure Any URL](http://www.pc-help.org/obscure.htm) and 🌎 [Magic IP Address Shortcuts](stuff-things.net/2014/09/25/magic-ip-address-shortcuts/).
###### Hashing, encryption and encoding (by 🌎 [Michal Špaček](twitter.com/spazef0rze))
_Hashing_
plaintext :arrow_right: hash
hash :no_entry: plaintext
_Symmetric encryption_
plaintext :arrow_right: :key: :arrow_right: ciphertext
plaintext :arrow_left: :key: :arrow_left: ciphertext
(:key: shared key)
_Asymmetric encryption_
plaintext :arrow_right: :key: :arrow_right: ciphertext
plaintext :arrow_left: :part_alternation_mark: :arrow_left: ciphertext
(:key: public key, :part_alternation_mark: private key)
_Encoding_
text :arrow_right: encoded
text :arrow_left: encoded
#### Shell One-liners [[TOC]](#anger-table-of-contents)
##### Table of Contents
* [terminal](#tool-terminal)
* [busybox](#tool-busybox)
* [mount](#tool-mount)
* [fuser](#tool-fuser)
* [lsof](#tool-lsof)
* [ps](#tool-ps)
* [top](#tool-top)
* [vmstat](#tool-vmstat)
* [iostat](#tool-iostat)
* [strace](#tool-strace)
* [kill](#tool-kill)
* [find](#tool-find)
* [diff](#tool-diff)
* [vimdiff](#tool-vimdiff)
* [tail](#tool-tail)
* [cpulimit](#tool-cpulimit)
* [pwdx](#tool-pwdx)
* [tr](#tool-tr)
* [chmod](#tool-chmod)
* [who](#tool-who)
* [last](#tool-last)
* [screen](#tool-screen)
* [script](#tool-script)
* [du](#tool-du)
* [inotifywait](#tool-inotifywait)
* [openssl](#tool-openssl)
* [secure-delete](#tool-secure-delete)
* [dd](#tool-dd)
* [gpg](#tool-gpg)
* [system-other](#tool-system-other)
* [curl](#tool-curl)
* [httpie](#tool-httpie)
* [ssh](#tool-ssh)
* [linux-dev](#tool-linux-dev)
* [tcpdump](#tool-tcpdump)
* [tcpick](#tool-tcpick)
* [ngrep](#tool-ngrep)
* [hping3](#tool-hping3)
* [nmap](#tool-nmap)
* [netcat](#tool-netcat)
* [socat](#tool-socat)
* [p0f](#tool-p0f)
* [gnutls-cli](#tool-gnutls-cli)
* [netstat](#tool-netstat)
* [rsync](#tool-rsync)
* [host](#tool-host)
* [dig](#tool-dig)
* [certbot](#tool-certbot)
* [network-other](#tool-network-other)
* [git](#tool-git)
* [awk](#tool-awk)
* [sed](#tool-sed)
* [grep](#tool-grep)
* [perl](#tool-perl)
##### Tool: 🌎 [terminal](en.wikipedia.org/wiki/Linux_console)
###### Reload shell without exit
```bash
exec $SHELL -l
```
###### Close shell keeping all subprocess running
```bash
disown -a && exit
```
###### Exit without saving shell history
```bash
kill -9 $$
unset HISTFILE && exit
```
###### Perform a branching conditional
```bash
true && echo success
false || echo failed
```
###### Pipe stdout and stderr to separate commands
```bash
some_command > >(/bin/cmd_for_stdout) 2> >(/bin/cmd_for_stderr)
```
###### Redirect stdout and stderr each to separate files and print both to the screen
```bash
(some_command 2>&1 1>&3 | tee errorlog ) 3>&1 1>&2 | tee stdoutlog
```
###### List of commands you use most often
```bash
history | \
awk '{CMD[$2]++;count++;}END { for (a in CMD)print CMD[a] " " CMD[a]/count*100 "% " a;}' | \
grep -v "./" | \
column -c3 -s " " -t | \
sort -nr | nl | head -n 20
```
###### Sterilize bash history
```bash
function sterile() {
history | awk '$2 != "history" { $1=""; print $0 }' | egrep -vi "\
curl\b+.*(-E|--cert)\b+.*\b*|\
curl\b+.*--pass\b+.*\b*|\
curl\b+.*(-U|--proxy-user).*:.*\b*|\
curl\b+.*(-u|--user).*:.*\b*
.*(-H|--header).*(token|auth.*)\b+.*|\
wget\b+.*--.*password\b+.*\b*|\
http.?://.+:.+@.*\
" > $HOME/histbuff; history -r $HOME/histbuff;
}
export PROMPT_COMMAND="sterile"
```
> Look also: 5⭐ 0🍴 [A naive utility to censor credentials in command history](https://github.com/lbonanomi/go/blob/master/revisionist.go)).
###### Quickly backup a file
```bash
cp filename{,.orig}
```
###### Empty a file (truncate to 0 size)
```bash
>filename
```
###### Delete all files in a folder that don't match a certain file extension
```bash
rm !(*.foo|*.bar|*.baz)
```
###### Pass multi-line string to a file
```bash
# cat >filename ... - overwrite the file
# cat >>filename ... - append to a file
cat > filename << __EOF__
data data data
__EOF__
```
###### Edit a file on a remote host using vim
```bash
vim scp://user@host//etc/fstab
```
###### Create a directory and change into it at the same time
```bash
mkd() { mkdir -p "$@" && cd "$@"; }
```
###### Convert uppercase files to lowercase files
```bash
rename 'y/A-Z/a-z/' *
```
###### Print a row of characters across the terminal
```bash
printf "%`tput cols`s" | tr ' ' '#'
```
###### Show shell history without line numbers
```bash
history | cut -c 8-
fc -l -n 1 | sed 's/^\s*//'
```
###### Run command(s) after exit session
```bash
cat > /etc/profile << __EOF__
_after_logout() {
username=$(whoami)
for _pid in $(ps afx | grep sshd | grep "$username" | awk '{print $1}') ; do
kill -9 $_pid
done
}
trap _after_logout EXIT
__EOF__
```
###### Generate a sequence of numbers
```bash
for ((i=1; i<=10; i+=2)) ; do echo $i ; done
# alternative: seq 1 2 10
for ((i=5; i<=10; ++i)) ; do printf '%02d\n' $i ; done
# alternative: seq -w 5 10
for i in {1..10} ; do echo $i ; done
```
###### Simple Bash filewatching
```bash
unset MAIL; export MAILCHECK=1; export MAILPATH='$FILE_TO_WATCH?$MESSAGE'
```
---
##### Tool: 🌎 [busybox](www.busybox.net/)
###### Static HTTP web server
```bash
busybox httpd -p $PORT -h $HOME [-c httpd.conf]
```
___
##### Tool: [mount](https://en.wikipedia.org/wiki/Mount_(Unix))
###### Mount a temporary ram partition
```bash
mount -t tmpfs tmpfs /mnt -o size=64M
```
* `-t` - filesystem type
* `-o` - mount options
###### Remount a filesystem as read/write
```bash
mount -o remount,rw /
```
___
##### Tool: [fuser](https://en.wikipedia.org/wiki/Fuser_(Unix))
###### Show which processes use the files/directories
```bash
fuser /var/log/daemon.log
fuser -v /home/supervisor
```
###### Kills a process that is locking a file
```bash
fuser -ki filename
```
* `-i` - interactive option
###### Kills a process that is locking a file with specific signal
```bash
fuser -k -HUP filename
```
* `--list-signals` - list available signal names
###### Show what PID is listening on specific port
```bash
fuser -v 53/udp
```
###### Show all processes using the named filesystems or block device
```bash
fuser -mv /var/www
```
___
##### Tool: 🌎 [lsof](en.wikipedia.org/wiki/Lsof)
###### Show process that use internet connection at the moment
```bash
lsof -P -i -n
```
###### Show process that use specific port number
```bash
lsof -i tcp:443
```
###### Lists all listening ports together with the PID of the associated process
```bash
lsof -Pan -i tcp -i udp
```
###### List all open ports and their owning executables
```bash
lsof -i -P | grep -i "listen"
```
###### Show all open ports
```bash
lsof -Pnl -i
```
###### Show open ports (LISTEN)
```bash
lsof -Pni4 | grep LISTEN | column -t
```
###### List all files opened by a particular command
```bash
lsof -c "process"
```
###### View user activity per directory
```bash
lsof -u username -a +D /etc
```
###### Show 10 largest open files
```bash
lsof / | \
awk '{ if($7 > 1048576) print $7/1048576 "MB" " " $9 " " $1 }' | \
sort -n -u | tail | column -t
```
###### Show current working directory of a process
```bash
lsof -p | grep cwd
```
___
##### Tool: [ps](https://en.wikipedia.org/wiki/Ps_(Unix))
###### Show a 4-way scrollable process tree with full details
```bash
ps awwfux | less -S
```
###### Processes per user counter
```bash
ps hax -o user | sort | uniq -c | sort -r
```
###### Show all processes by name with main header
```bash
ps -lfC nginx
```
___
##### Tool: [find](https://en.wikipedia.org/wiki/Find_(Unix))
###### Find files that have been modified on your system in the past 60 minutes
```bash
find / -mmin 60 -type f
```
###### Find all files larger than 20M
```bash
find / -type f -size +20M
```
###### Find duplicate files (based on MD5 hash)
```bash
find -type f -exec md5sum '{}' ';' | sort | uniq --all-repeated=separate -w 33
```
###### Change permission only for files
```bash
cd /var/www/site && find . -type f -exec chmod 766 {} \;
cd /var/www/site && find . -type f -exec chmod 664 {} +
```
###### Change permission only for directories
```bash
cd /var/www/site && find . -type d -exec chmod g+x {} \;
cd /var/www/site && find . -type d -exec chmod g+rwx {} +
```
###### Find files and directories for specific user/group
```bash
# User:
find . -user -print
find /etc -type f -user -name "*.conf"
# Group:
find /opt -group
find /etc -type f -group -iname "*.conf"
```
###### Find files and directories for all without specific user/group
```bash
# User:
find . \! -user -print
# Group:
find . \! -group
```
###### Looking for files/directories that only have certain permission
```bash
# User
find . -user -perm -u+rw # -rw-r--r--
find /home -user $(whoami) -perm 777 # -rwxrwxrwx
# Group:
find /home -type d -group -perm 755 # -rwxr-xr-x
```
###### Delete older files than 60 days
```bash
find . -type f -mtime +60 -delete
```
###### Recursively remove all empty sub-directories from a directory
```bash
find . -depth -type d -empty -exec rmdir {} \;
```
###### How to find all hard links to a file
```bash
find -xdev -samefile filename
```
###### Recursively find the latest modified files
```bash
find . -type f -exec stat --format '%Y :%y %n' "{}" \; | sort -nr | cut -d: -f2- | head
```
###### Recursively find/replace of a string with sed
```bash
find . -not -path '*/\.git*' -type f -print0 | xargs -0 sed -i 's/foo/bar/g'
```
###### Recursively find/replace of a string in directories and file names
```bash
find . -depth -name '*test*' -execdir bash -c 'mv -v "$1" "${1//foo/bar}"' _ {} \;
```
###### Recursively find suid executables
```bash
find / \( -perm -4000 -o -perm -2000 \) -type f -exec ls -la {} \;
```
___
##### Tool: [top](https://en.wikipedia.org/wiki/Top_(software))
###### Use top to monitor only all processes with the specific string
```bash
top -p $(pgrep -d , )
```
* `` - process containing string (eg. nginx, worker)
___
##### Tool: 🌎 [vmstat](en.wikipedia.org/wiki/Vmstat)
###### Show current system utilization (fields in kilobytes)
```bash
vmstat 2 20 -t -w
```
* `2` - number of times with a defined time interval (delay)
* `20` - each execution of the command (count)
* `-t` - show timestamp
* `-w` - wide output
* `-S M` - output of the fields in megabytes instead of kilobytes
###### Show current system utilization will get refreshed every 5 seconds
```bash
vmstat 5 -w
```
###### Display report a summary of disk operations
```bash
vmstat -D
```
###### Display report of event counters and memory stats
```bash
vmstat -s
```
###### Display report about kernel objects stored in slab layer cache
```bash
vmstat -m
```
##### Tool: 🌎 [iostat](en.wikipedia.org/wiki/Iostat)
###### Show information about the CPU usage, and I/O statistics about all the partitions
```bash
iostat 2 10 -t -m
```
* `2` - number of times with a defined time interval (delay)
* `10` - each execution of the command (count)
* `-t` - show timestamp
* `-m` - fields in megabytes (`-k` - in kilobytes, default)
###### Show information only about the CPU utilization
```bash
iostat 2 10 -t -m -c
```
###### Show information only about the disk utilization
```bash
iostat 2 10 -t -m -d
```
###### Show information only about the LVM utilization
```bash
iostat -N
```
___
##### Tool: 🌎 [strace](en.wikipedia.org/wiki/Strace)
###### Track with child processes
```bash
# 1)
strace -f -p $(pidof glusterfsd)
# 2)
strace -f $(pidof php-fpm | sed 's/\([0-9]*\)/\-p \1/g')
```
###### Track process with 30 seconds limit
```bash
timeout 30 strace $(< /var/run/zabbix/zabbix_agentd.pid)
```
###### Track processes and redirect output to a file
```bash
ps auxw | grep '[a]pache' | awk '{print " -p " $2}' | \
xargs strace -o /tmp/strace-apache-proc.out
```
###### Track with print time spent in each syscall and limit length of print strings
```bash
ps auxw | grep '[i]init_policy' | awk '{print " -p " $2}' | \
xargs strace -f -e trace=network -T -s 10000
```
###### Track the open request of a network port
```bash
strace -f -e trace=bind nc -l 80
```
###### Track the open request of a network port (show TCP/UDP)
```bash
strace -f -e trace=network nc -lu 80
```
___
##### Tool: [kill](https://en.wikipedia.org/wiki/Kill_(command))
###### Kill a process running on port
```bash
kill -9 $(lsof -i : | awk '{l=$2} END {print l}')
```
___
##### Tool: 🌎 [diff](en.wikipedia.org/wiki/Diff)
###### Compare two directory trees
```bash
diff <(cd directory1 && find | sort) <(cd directory2 && find | sort)
```
###### Compare output of two commands
```bash
diff <(cat /etc/passwd) <(cut -f2 /etc/passwd)
```
___
##### Tool: [vimdiff](http://vimdoc.sourceforge.net/htmldoc/diff.html)
###### Highlight the exact differences, based on characters and words
```bash
vimdiff file1 file2
```
###### Compare two JSON files
```bash
vimdiff <(jq -S . A.json) <(jq -S . B.json)
```
###### Compare Hex dump
```bash
d(){ vimdiff <(f $1) <(f $2);};f(){ hexdump -C $1 | cut -d' ' -f3- | tr -s ' ';}; d ~/bin1 ~/bin2
```
###### diffchar
Save 🌎 [diffchar](raw.githubusercontent.com/vim-scripts/diffchar.vim/master/plugin/diffchar.vim) @ `~/.vim/plugins`
Click `F7` to switch between diff modes
Usefull `vimdiff` commands:
* `qa` to exit all windows
* `:vertical resize 70` to resize window
* set window width `Ctrl+W [N columns]+(Shift+)<\>`
___
##### Tool: [tail](https://en.wikipedia.org/wiki/Tail_(Unix))
###### Annotate tail -f with timestamps
```bash
tail -f file | while read ; do echo "$(date +%T.%N) $REPLY" ; done
```
###### Analyse an Apache access log for the most common IP addresses
```bash
tail -10000 access_log | awk '{print $1}' | sort | uniq -c | sort -n | tail
```
###### Analyse web server log and show only 5xx http codes
```bash
tail -n 100 -f /path/to/logfile | grep "HTTP/[1-2].[0-1]\" [5]"
```
___
##### Tool: [tar](https://en.wikipedia.org/wiki/Tar_(computing))
###### System backup with exclude specific directories
```bash
cd /
tar -czvpf /mnt/system$(date +%d%m%Y%s).tgz --directory=/ \
--exclude=proc/* --exclude=sys/* --exclude=dev/* --exclude=mnt/* .
```
###### System backup with exclude specific directories (pigz)
```bash
cd /
tar cvpf /backup/snapshot-$(date +%d%m%Y%s).tgz --directory=/ \
--exclude=proc/* --exclude=sys/* --exclude=dev/* \
--exclude=mnt/* --exclude=tmp/* --use-compress-program=pigz .
```
___
##### Tool: [dump](https://en.wikipedia.org/wiki/Dump_(program))
###### System backup to file
```bash
dump -y -u -f /backup/system$(date +%d%m%Y%s).lzo /
```
###### Restore system from lzo file
```bash
cd /
restore -rf /backup/system$(date +%d%m%Y%s).lzo
```
___
##### Tool: [cpulimit](http://cpulimit.sourceforge.net/)
###### Limit the cpu usage of a process
```bash
cpulimit -p pid -l 50
```
___
##### Tool: 🌎 [pwdx](www.cyberciti.biz/faq/unix-linux-pwdx-command-examples-usage-syntax/)
###### Show current working directory of a process
```bash
pwdx
```
___
##### Tool: 🌎 [taskset](www.cyberciti.biz/faq/taskset-cpu-affinity-command/)
###### Start a command on only one CPU core
```bash
taskset -c 0
```
___
##### Tool: [tr](https://en.wikipedia.org/wiki/Tr_(Unix))
###### Show directories in the PATH, one per line
```bash
tr : '\n' <<<$PATH
```
___
##### Tool: 🌎 [chmod](en.wikipedia.org/wiki/Chmod)
###### Remove executable bit from all files in the current directory
```bash
chmod -R -x+X *
```
###### Restore permission for /bin/chmod
```bash
# 1:
cp /bin/ls chmod.01
cp /bin/chmod chmod.01
./chmod.01 700 file
# 2:
/bin/busybox chmod 0700 /bin/chmod
# 3:
setfacl --set u::rwx,g::---,o::--- /bin/chmod
```
___
##### Tool: [who](https://en.wikipedia.org/wiki/Who_(Unix))
###### Find last reboot time
```bash
who -b
```
###### Detect a user sudo-su'd into the current shell
```bash
[[ $(who -m | awk '{ print $1 }') == $(whoami) ]] || echo "You are su-ed to $(whoami)"
```
___
##### Tool: 🌎 [last](www.howtoforge.com/linux-last-command/)
###### Was the last reboot a panic?
```bash
(last -x -f $(ls -1t /var/log/wtmp* | head -2 | tail -1); last -x -f /var/log/wtmp) | \
grep -A1 reboot | head -2 | grep -q shutdown && echo "Expected reboot" || echo "Panic reboot"
```
___
##### Tool: 🌎 [screen](en.wikipedia.org/wiki/GNU_Screen)
###### Start screen in detached mode
```bash
screen -d -m
```
###### Attach to an existing screen session
```bash
screen -r -d
```
___
##### Tool: [script](https://en.wikipedia.org/wiki/Script_(Unix))
###### Record and replay terminal session
```bash
### Record session
# 1)
script -t 2>~/session.time -a ~/session.log
# 2)
script --timing=session.time session.log
### Replay session
scriptreplay --timing=session.time session.log
```
___
##### Tool: 🌎 [du](en.wikipedia.org/wiki/GNU_Screen)
###### Show 20 biggest directories with 'K M G'
```bash
du | \
sort -r -n | \
awk '{split("K M G",v); s=1; while($1>1024){$1/=1024; s++} print int($1)" "v[s]"\t"$2}' | \
head -n 20
```
___
##### Tool: 🌎 [inotifywait](en.wikipedia.org/wiki/GNU_Screen)
###### Init tool everytime a file in a directory is modified
```bash
while true ; do inotifywait -r -e MODIFY dir/ && ls dir/ ; done;
```
___
##### Tool: 🌎 [openssl](www.openssl.org/)
###### Testing connection to the remote host
```bash
echo | openssl s_client -connect google.com:443 -showcerts
```
###### Testing connection to the remote host (debug mode)
```bash
echo | openssl s_client -connect google.com:443 -showcerts -tlsextdebug -status
```
###### Testing connection to the remote host (with SNI support)
```bash
echo | openssl s_client -showcerts -servername google.com -connect google.com:443
```
###### Testing connection to the remote host with specific ssl version
```bash
openssl s_client -tls1_2 -connect google.com:443
```
###### Testing connection to the remote host with specific ssl cipher
```bash
openssl s_client -cipher 'AES128-SHA' -connect google.com:443
```
###### Verify 0-RTT
```bash
_host="example.com"
cat > req.in << __EOF__
HEAD / HTTP/1.1
Host: $_host
Connection: close
__EOF__
openssl s_client -connect ${_host}:443 -tls1_3 -sess_out session.pem -ign_eof < req.in
openssl s_client -connect ${_host}:443 -tls1_3 -sess_in session.pem -early_data req.in
```
###### Generate private key without passphrase
```bash
# _len: 2048, 4096
( _fd="private.key" ; _len="2048" ; \
openssl genrsa -out ${_fd} ${_len} )
```
###### Generate private key with passphrase
```bash
# _ciph: aes128, aes256
# _len: 2048, 4096
( _ciph="aes128" ; _fd="private.key" ; _len="2048" ; \
openssl genrsa -${_ciph} -out ${_fd} ${_len} )
```
###### Remove passphrase from private key
```bash
( _fd="private.key" ; _fd_unp="private_unp.key" ; \
openssl rsa -in ${_fd} -out ${_fd_unp} )
```
###### Encrypt existing private key with a passphrase
```bash
# _ciph: aes128, aes256
( _ciph="aes128" ; _fd="private.key" ; _fd_pass="private_pass.key" ; \
openssl rsa -${_ciph} -in ${_fd} -out ${_fd_pass}
```
###### Check private key
```bash
( _fd="private.key" ; \
openssl rsa -check -in ${_fd} )
```
###### Get public key from private key
```bash
( _fd="private.key" ; _fd_pub="public.key" ; \
openssl rsa -pubout -in ${_fd} -out ${_fd_pub} )
```
###### Generate private key and CSR
```bash
( _fd="private.key" ; _fd_csr="request.csr" ; _len="2048" ; \
openssl req -out ${_fd_csr} -new -newkey rsa:${_len} -nodes -keyout ${_fd} )
```
###### Generate CSR
```bash
( _fd="private.key" ; _fd_csr="request.csr" ; \
openssl req -out ${_fd_csr} -new -key ${_fd} )
```
###### Generate CSR (metadata from existing certificate)
> Where `private.key` is the existing private key. As you can see you do not generate this CSR from your certificate (public key). Also you do not generate the "same" CSR, just a new one to request a new certificate.
```bash
( _fd="private.key" ; _fd_csr="request.csr" ; _fd_crt="cert.crt" ; \
openssl x509 -x509toreq -in ${_fd_crt} -out ${_fd_csr} -signkey ${_fd} )
```
###### Generate CSR with -config param
```bash
( _fd="private.key" ; _fd_csr="request.csr" ; \
openssl req -new -sha256 -key ${_fd} -out ${_fd_csr} \
-config <(
cat << __EOF__
[req]
default_bits = 2048
default_md = sha256
prompt = no
distinguished_name = dn
req_extensions = req_ext
[ dn ]
C = ""
ST = ""
L = ""
O = ""
OU = ""
CN = ""
[ req_ext ]
subjectAltName = @alt_names
[ alt_names ]
DNS.1 =
DNS.2 =
DNS.3 =
__EOF__
))
```
Other values in `[ dn ]`:
```
countryName = "DE" # C=
stateOrProvinceName = "Hessen" # ST=
localityName = "Keller" # L=
postalCode = "424242" # L/postalcode=
postalAddress = "Keller" # L/postaladdress=
streetAddress = "Crater 1621" # L/street=
organizationName = "apfelboymschule" # O=
organizationalUnitName = "IT Department" # OU=
commonName = "example.com" # CN=
emailAddress = "[email protected]" # CN/emailAddress=
```
Example of `oids` (you'll probably also have to make OpenSSL know about the new fields required for EV by adding the following under `[new_oids]`):
```
[req]
...
oid_section = new_oids
[ new_oids ]
postalCode = 2.5.4.17
streetAddress = 2.5.4.9
```
Full example:
```bash
( _fd="private.key" ; _fd_csr="request.csr" ; \
openssl req -new -sha256 -key ${_fd} -out ${_fd_csr} \
-config <(
cat << __EOF__
[req]
default_bits = 2048
default_md = sha256
prompt = no
distinguished_name = dn
req_extensions = req_ext
oid_section = new_oids
[ new_oids ]
serialNumber = 2.5.4.5
streetAddress = 2.5.4.9
postalCode = 2.5.4.17
businessCategory = 2.5.4.15
[ dn ]
serialNumber=00001111
businessCategory=Private Organization
jurisdictionC=DE
C=DE
ST=Hessen
L=Keller
postalCode=424242
streetAddress=Crater 1621
O=AV Company
OU=IT
CN=example.com
[ req_ext ]
subjectAltName = @alt_names
[ alt_names ]
DNS.1 = example.com
__EOF__
))
```
For more information please look at these great explanations:
- 🌎 [RFC 5280](tools.ietf.org/html/rfc5280)
- 🌎 [How to create multidomain certificates using config files](apfelboymchen.net/gnu/notes/openssl%20multidomain%20with%20config%20files.html)
- 🌎 [Generate a multi domains certificate using config files](gist.github.com/romainnorberg/464758a6620228b977212a3cf20c3e08)
- 🌎 [Your OpenSSL CSR command is out of date](expeditedsecurity.com/blog/openssl-csr-command/)
- 🌎 [OpenSSL example configuration file](www.tbs-certificats.com/openssl-dem-server-cert.cnf)
- 🌎 [Object Identifiers (OIDs)](www.alvestrand.no/objectid/)
- 26053⭐ 10171🍴 [openssl objects.txt](https://github.com/openssl/openssl/blob/master/crypto/objects/objects.txt))
###### List available EC curves
```bash
openssl ecparam -list_curves
```
###### Print ECDSA private and public keys
```bash
( _fd="private.key" ; \
openssl ec -in ${_fd} -noout -text )
# For x25519 only extracting public key
( _fd="private.key" ; _fd_pub="public.key" ; \
openssl pkey -in ${_fd} -pubout -out ${_fd_pub} )
```
###### Generate ECDSA private key
```bash
# _curve: prime256v1, secp521r1, secp384r1
( _fd="private.key" ; _curve="prime256v1" ; \
openssl ecparam -out ${_fd} -name ${_curve} -genkey )
# _curve: X25519
( _fd="private.key" ; _curve="x25519" ; \
openssl genpkey -algorithm ${_curve} -out ${_fd} )
```
###### Generate private key and CSR (ECC)
```bash
# _curve: prime256v1, secp521r1, secp384r1
( _fd="domain.com.key" ; _fd_csr="domain.com.csr" ; _curve="prime256v1" ; \
openssl ecparam -out ${_fd} -name ${_curve} -genkey ; \
openssl req -new -key ${_fd} -out ${_fd_csr} -sha256 )
```
###### Generate self-signed certificate
```bash
# _len: 2048, 4096
( _fd="domain.key" ; _fd_out="domain.crt" ; _len="2048" ; _days="365" ; \
openssl req -newkey rsa:${_len} -nodes \
-keyout ${_fd} -x509 -days ${_days} -out ${_fd_out} )
```
###### Generate self-signed certificate from existing private key
```bash
# _len: 2048, 4096
( _fd="domain.key" ; _fd_out="domain.crt" ; _days="365" ; \
openssl req -key ${_fd} -nodes \
-x509 -days ${_days} -out ${_fd_out} )
```
###### Generate self-signed certificate from existing private key and csr
```bash
# _len: 2048, 4096
( _fd="domain.key" ; _fd_csr="domain.csr" ; _fd_out="domain.crt" ; _days="365" ; \
openssl x509 -signkey ${_fd} -nodes \
-in ${_fd_csr} -req -days ${_days} -out ${_fd_out} )
```
###### Generate DH public parameters
```bash
( _dh_size="2048" ; \
openssl dhparam -out /etc/nginx/ssl/dhparam_${_dh_size}.pem "$_dh_size" )
```
###### Display DH public parameters
```bash
openssl pkeyparam -in dhparam.pem -text
```
###### Extract private key from pfx
```bash
( _fd_pfx="cert.pfx" ; _fd_key="key.pem" ; \
openssl pkcs12 -in ${_fd_pfx} -nocerts -nodes -out ${_fd_key} )
```
###### Extract private key and certs from pfx
```bash
( _fd_pfx="cert.pfx" ; _fd_pem="key_certs.pem" ; \
openssl pkcs12 -in ${_fd_pfx} -nodes -out ${_fd_pem} )
```
###### Extract certs from p7b
```bash
# PKCS#7 file doesn't include private keys.
( _fd_p7b="cert.p7b" ; _fd_pem="cert.pem" ; \
openssl pkcs7 -inform DER -outform PEM -in ${_fd_p7b} -print_certs > ${_fd_pem})
# or:
openssl pkcs7 -print_certs -in -in ${_fd_p7b} -out ${_fd_pem})
```
###### Convert DER to PEM
```bash
( _fd_der="cert.crt" ; _fd_pem="cert.pem" ; \
openssl x509 -in ${_fd_der} -inform der -outform pem -out ${_fd_pem} )
```
###### Convert PEM to DER
```bash
( _fd_der="cert.crt" ; _fd_pem="cert.pem" ; \
openssl x509 -in ${_fd_pem} -outform der -out ${_fd_der} )
```
###### Verification of the private key
```bash
( _fd="private.key" ; \
openssl rsa -noout -text -in ${_fd} )
```
###### Verification of the public key
```bash
# 1)
( _fd="public.key" ; \
openssl pkey -noout -text -pubin -in ${_fd} )
# 2)
( _fd="private.key" ; \
openssl rsa -inform PEM -noout -in ${_fd} &> /dev/null ; \
if [ $? = 0 ] ; then echo -en "OK\n" ; fi )
```
###### Verification of the certificate
```bash
( _fd="certificate.crt" ; # format: pem, cer, crt \
openssl x509 -noout -text -in ${_fd} )
```
###### Verification of the CSR
```bash
( _fd_csr="request.csr" ; \
openssl req -text -noout -in ${_fd_csr} )
```
###### Check the private key and the certificate are match
```bash
(openssl rsa -noout -modulus -in private.key | openssl md5 ; \
openssl x509 -noout -modulus -in certificate.crt | openssl md5) | uniq
```
###### Check the private key and the CSR are match
```bash
(openssl rsa -noout -modulus -in private.key | openssl md5 ; \
openssl req -noout -modulus -in request.csr | openssl md5) | uniq
```
___
##### Tool: 🌎 [secure-delete](wiki.archlinux.org/index.php/Securely_wipe_disk)
###### Secure delete with shred
```bash
shred -vfuz -n 10 file
shred --verbose --random-source=/dev/urandom -n 1 /dev/sda
```
###### Secure delete with scrub
```bash
scrub -p dod /dev/sda
scrub -p dod -r file
```
###### Secure delete with badblocks
```bash
badblocks -s -w -t random -v /dev/sda
badblocks -c 10240 -s -w -t random -v /dev/sda
```
###### Secure delete with secure-delete
```bash
srm -vz /tmp/file
sfill -vz /local
sdmem -v
swapoff /dev/sda5 && sswap -vz /dev/sda5
```
___
##### Tool: [dd](https://en.wikipedia.org/wiki/Dd_(Unix))
###### Show dd status every so often
```bash
dd status=progress
watch --interval 5 killall -USR1 dd
```
###### Redirect output to a file with dd
```bash
echo "string" | dd of=filename
```
___
##### Tool: 🌎 [gpg](www.gnupg.org/)
###### Export public key
```bash
gpg --export --armor "" > username.pkey
```
* `--export` - export all keys from all keyrings or specific key
* `-a|--armor` - create ASCII armored output
###### Encrypt file
```bash
gpg -e -r "" dump.sql
```
* `-e|--encrypt` - encrypt data
* `-r|--recipient` - encrypt for specific
###### Decrypt file
```bash
gpg -o dump.sql -d dump.sql.gpg
```
* `-o|--output` - use as output file
* `-d|--decrypt` - decrypt data (default)
###### Search recipient
```bash
gpg --keyserver hkp://keyserver.ubuntu.com --search-keys ""
```
* `--keyserver` - set specific key server
* `--search-keys` - search for keys on a key server
###### List all of the packets in an encrypted file
```bash
gpg --batch --list-packets archive.gpg
gpg2 --batch --list-packets archive.gpg
```
___
##### Tool: 150387⭐ 9612🍴 [system-other](https://github.com/trimstray/the-book-of-secret-knowledge#tool-system-other))
###### Reboot system from init
```bash
exec /sbin/init 6
```
###### Init system from single user mode
```bash
exec /sbin/init
```
###### Show current working directory of a process
```bash
readlink -f /proc//cwd
```
###### Show actual pathname of the executed command
```bash
readlink -f /proc//exe
```
##### Tool: 🌎 [curl](curl.haxx.se)
```bash
curl -Iks https://www.google.com
```
* `-I` - show response headers only
* `-k` - insecure connection when using ssl
* `-s` - silent mode (not display body)
```bash
curl -Iks --location -X GET -A "x-agent" https://www.google.com
```
* `--location` - follow redirects
* `-X` - set method
* `-A` - set user-agent
```bash
curl -Iks --location -X GET -A "x-agent" --proxy http://127.0.0.1:16379 https://www.google.com
```
* `--proxy [socks5://|http://]` - set proxy server
```bash
curl -o file.pdf -C - https://example.com/Aiju2goo0Ja2.pdf
```
* `-o` - write output to file
* `-C` - resume the transfer
###### Find your external IP address (external services)
```bash
curl ipinfo.io
curl ipinfo.io/ip
curl icanhazip.com
curl ifconfig.me/ip ; echo
```
###### Repeat URL request
```bash
# URL sequence substitution with a dummy query string:
curl -ks https://example.com/?[1-20]
# With shell 'for' loop:
for i in {1..20} ; do curl -ks https://example.com/ ; done
```
###### Check DNS and HTTP trace with headers for specific domains
```bash
### Set domains and external dns servers.
_domain_list=(google.com) ; _dns_list=("8.8.8.8" "1.1.1.1")
for _domain in "${_domain_list[@]}" ; do
printf '=%.0s' {1..48}
echo
printf "[\\e[1;32m+\\e[m] resolve: %s\\n" "$_domain"
for _dns in "${_dns_list[@]}" ; do
# Resolve domain.
host "${_domain}" "${_dns}"
echo
done
for _proto in http https ; do
printf "[\\e[1;32m+\\e[m] trace + headers: %s://%s\\n" "$_proto" "$_domain"
# Get trace and http headers.
curl -Iks -A "x-agent" --location "${_proto}://${_domain}"
echo
done
done
unset _domain_list _dns_list
```
___
##### Tool: 🌎 [httpie](httpie.org/)
```bash
http -p Hh https://www.google.com
```
* `-p` - print request and response headers
* `H` - request headers
* `B` - request body
* `h` - response headers
* `b` - response body
```bash
http -p Hh https://www.google.com --follow --verify no
```
* `-F, --follow` - follow redirects
* `--verify no` - skip SSL verification
```bash
http -p Hh https://www.google.com --follow --verify no \
--proxy http:http://127.0.0.1:16379
```
* `--proxy [http:]` - set proxy server
##### Tool: 🌎 [ssh](www.openssh.com/)
###### Escape Sequence
```
# Supported escape sequences:
~. - terminate connection (and any multiplexed sessions)
~B - send a BREAK to the remote system
~C - open a command line
~R - Request rekey (SSH protocol 2 only)
~^Z - suspend ssh
~# - list forwarded connections
~& - background ssh (when waiting for connections to terminate)
~? - this message
~~ - send the escape character by typing it twice
```
###### Compare a remote file with a local file
```bash
ssh user@host cat /path/to/remotefile | diff /path/to/localfile -
```
###### SSH connection through host in the middle
```bash
ssh -t reachable_host ssh unreachable_host
```
###### Run command over SSH on remote host
```bash
cat > cmd.txt << __EOF__
cat /etc/hosts
__EOF__
ssh host -l user $(&1 | tee -a "${_sesdir}/$(date +%Y%m%d).log"
}
# Alias:
alias ssh='_ssh_sesslog'
```
###### Using Keychain for SSH logins
```bash
### Delete all of ssh-agent's keys.
function _scl() {
/usr/bin/keychain --clear
}
### Add key to keychain.
function _scg() {
/usr/bin/keychain /path/to/private-key
source "$HOME/.keychain/$HOSTNAME-sh"
}
```
###### SSH login without processing any login scripts
```bash
ssh -tt user@host bash
```
###### SSH local port forwarding
Example 1:
```bash
# Forwarding our local 2250 port to nmap.org:443 from localhost through localhost
host1> ssh -L 2250:nmap.org:443 localhost
# Connect to the service:
host1> curl -Iks --location -X GET https://localhost:2250
```
Example 2:
```bash
# Forwarding our local 9051 port to db.d.x:5432 from localhost through node.d.y
host1> ssh -nNT -L 9051:db.d.x:5432 node.d.y
# Connect to the service:
host1> psql -U db_user -d db_dev -p 9051 -h localhost
```
* `-n` - redirects stdin from `/dev/null`
* `-N` - do not execute a remote command
* `-T` - disable pseudo-terminal allocation
###### SSH remote port forwarding
```bash
# Forwarding our local 9051 port to db.d.x:5432 from host2 through node.d.y
host1> ssh -nNT -R 9051:db.d.x:5432 node.d.y
# Connect to the service:
host2> psql -U postgres -d postgres -p 8000 -h localhost
```
___
##### Tool: 🌎 [linux-dev](www.tldp.org/LDP/abs/html/devref1.html)
###### Testing remote connection to port
```bash
timeout 1 bash -c "//" >/dev/null 2>&1 ; echo $?
```
* `` - set remote host
* `` - set destination port
###### Read and write to TCP or UDP sockets with common bash tools
```bash
exec 5<>/dev/tcp//; cat <&5 & cat >&5; exec 5>&-
```
___
##### Tool: [tcpdump](http://www.tcpdump.org/)
###### Filter incoming (on interface) traffic (specific )
```bash
tcpdump -ne -i eth0 -Q in host 192.168.252.1 and port 443
```
* `-n` - don't convert addresses (`-nn` will not resolve hostnames or ports)
* `-e` - print the link-level headers
* `-i [iface|any]` - set interface
* `-Q|-D [in|out|inout]` - choose send/receive direction (`-D` - for old tcpdump versions)
* `host [ip|hostname]` - set host, also `[host not]`
* `[and|or]` - set logic
* `port [1-65535]` - set port number, also `[port not]`
###### Filter incoming (on interface) traffic (specific ) and write to a file
```bash
tcpdump -ne -i eth0 -Q in host 192.168.252.1 and port 443 -c 5 -w tcpdump.pcap
```
* `-c [num]` - capture only num number of packets
* `-w [filename]` - write packets to file, `-r [filename]` - reading from file
###### Capture all ICMP packets
```bash
tcpdump -nei eth0 icmp
```
###### Check protocol used (TCP or UDP) for service
```bash
tcpdump -nei eth0 tcp port 22 -vv -X | egrep "TCP|UDP"
```
###### Display ASCII text (to parse the output using grep or other)
```bash
tcpdump -i eth0 -A -s0 port 443
```
###### Grab everything between two keywords
```bash
tcpdump -i eth0 port 80 -X | sed -n -e '/username/,/=ldap/ p'
```
###### Grab user and pass ever plain http
```bash
tcpdump -i eth0 port http -l -A | egrep -i \
'pass=|pwd=|log=|login=|user=|username=|pw=|passw=|passwd=|password=|pass:|user:|username:|password:|login:|pass |user ' \
--color=auto --line-buffered -B20
```
###### Extract HTTP User Agent from HTTP request header
```bash
tcpdump -ei eth0 -nn -A -s1500 -l | grep "User-Agent:"
```
###### Capture only HTTP GET and POST packets
```bash
tcpdump -ei eth0 -s 0 -A -vv \
'tcp[((tcp[12:1] & 0xf0) >> 2):4] = 0x47455420' or 'tcp[((tcp[12:1] & 0xf0) >> 2):4] = 0x504f5354'
```
or simply:
```bash
tcpdump -ei eth0 -s 0 -v -n -l | egrep -i "POST /|GET /|Host:"
```
###### Rotate capture files
```bash
tcpdump -ei eth0 -w /tmp/capture-%H.pcap -G 3600 -C 200
```
* `-G ` - pcap will be created every `` seconds
* `-C ` - close the current pcap and open a new one if is larger than ``
###### Top hosts by packets
```bash
tcpdump -ei enp0s25 -nnn -t -c 200 | cut -f 1,2,3,4 -d '.' | sort | uniq -c | sort -nr | head -n 20
```
###### Excludes any RFC 1918 private address
```bash
tcpdump -nei eth0 'not (src net (10 or 172.16/12 or 192.168/16) and dst net (10 or 172.16/12 or 192.168/16))'
```
___
##### Tool: [tcpick](http://tcpick.sourceforge.net/)
###### Analyse packets in real-time
```bash
while true ; do tcpick -a -C -r dump.pcap ; sleep 2 ; clear ; done
```
___
##### Tool: [ngrep](http://ngrep.sourceforge.net/usage.html)
```bash
ngrep -d eth0 "www.domain.com" port 443
```
* `-d [iface|any]` - set interface
* `[domain]` - set hostname
* `port [1-65535]` - set port number
```bash
ngrep -d eth0 "www.domain.com" src host 10.240.20.2 and port 443
```
* `(host [ip|hostname])` - filter by ip or hostname
* `(port [1-65535])` - filter by port number
```bash
ngrep -d eth0 -qt -O ngrep.pcap "www.domain.com" port 443
```
* `-q` - quiet mode (only payloads)
* `-t` - added timestamps
* `-O [filename]` - save output to file, `-I [filename]` - reading from file
```bash
ngrep -d eth0 -qt 'HTTP' 'tcp'
```
* `HTTP` - show http headers
* `tcp|udp` - set protocol
* `[src|dst] host [ip|hostname]` - set direction for specific node
```bash
ngrep -l -q -d eth0 -i "User-Agent: curl*"
```
* `-l` - stdout line buffered
* `-i` - case-insensitive search
___
##### Tool: [hping3](http://www.hping.org/)
```bash
hping3 -V -p 80 -s 5050 www.google.com
```
* `-V|--verbose` - verbose mode
* `-p|--destport` - set destination port
* `-s|--baseport` - set source port
* `` - set scan type
* `-F|--fin` - set FIN flag, port open if no reply
* `-S|--syn` - set SYN flag
* `-P|--push` - set PUSH flag
* `-A|--ack` - set ACK flag (use when ping is blocked, RST response back if the port is open)
* `-U|--urg` - set URG flag
* `-Y|--ymas` - set Y unused flag (0x80 - nullscan), port open if no reply
* `-M 0 -UPF` - set TCP sequence number and scan type (URG+PUSH+FIN), port open if no reply
```bash
hping3 -V -c 1 -1 -C 8 www.google.com
```
* `-c [num]` - packet count
* `-1` - set ICMP mode
* `-C|--icmptype [icmp-num]` - set icmp type (default icmp-echo = 8)
```bash
hping3 -V -c 1000000 -d 120 -S -w 64 -p 80 --flood --rand-source
```
* `--flood` - sent packets as fast as possible (don't show replies)
* `--rand-source` - random source address mode
* `-d --data` - data size
* `-w|--win` - winsize (default 64)
___
##### Tool: 🌎 [nmap](nmap.org/)
###### Ping scans the network
```bash
nmap -sP 192.168.0.0/24
```
###### Show only open ports
```bash
nmap -F --open 192.168.0.0/24
```
###### Full TCP port scan using with service version detection
```bash
nmap -p 1-65535 -sV -sS -T4 192.168.0.0/24
```
###### Nmap scan and pass output to Nikto
```bash
nmap -p80,443 192.168.0.0/24 -oG - | nikto.pl -h -
```
###### Recon specific ip:service with Nmap NSE scripts stack
```bash
# Set variables:
_hosts="192.168.250.10"
_ports="80,443"
# Set Nmap NSE scripts stack:
_nmap_nse_scripts="+dns-brute,\
+http-auth-finder,\
+http-chrono,\
+http-cookie-flags,\
+http-cors,\
+http-cross-domain-policy,\
+http-csrf,\
+http-dombased-xss,\
+http-enum,\
+http-errors,\
+http-git,\
+http-grep,\
+http-internal-ip-disclosure,\
+http-jsonp-detection,\
+http-malware-host,\
+http-methods,\
+http-passwd,\
+http-phpself-xss,\
+http-php-version,\
+http-robots.txt,\
+http-sitemap-generator,\
+http-shellshock,\
+http-stored-xss,\
+http-title,\
+http-unsafe-output-escaping,\
+http-useragent-tester,\
+http-vhosts,\
+http-waf-detect,\
+http-waf-fingerprint,\
+http-xssed,\
+traceroute-geolocation.nse,\
+ssl-enum-ciphers,\
+whois-domain,\
+whois-ip"
# Set Nmap NSE script params:
_nmap_nse_scripts_args="dns-brute.domain=${_hosts},http-cross-domain-policy.domain-lookup=true,"
_nmap_nse_scripts_args+="http-waf-detect.aggro,http-waf-detect.detectBodyChanges,"
_nmap_nse_scripts_args+="http-waf-fingerprint.intensive=1"
# Perform scan:
nmap --script="$_nmap_nse_scripts" --script-args="$_nmap_nse_scripts_args" -p "$_ports" "$_hosts"
```
___
##### Tool: [netcat](http://netcat.sourceforge.net/)
```bash
nc -kl 5000
```
* `-l` - listen for an incoming connection
* `-k` - listening after client has disconnected
* `>filename.out` - save receive data to file (optional)
```bash
nc 192.168.0.1 5051 < filename.in
```
* `< filename.in` - send data to remote host
```bash
nc -vz 10.240.30.3 5000
```
* `-v` - verbose output
* `-z` - scan for listening daemons
```bash
nc -vzu 10.240.30.3 1-65535
```
* `-u` - scan only udp ports
###### Transfer data file (archive)
```bash
server> nc -l 5000 | tar xzvfp -
client> tar czvfp - /path/to/dir | nc 10.240.30.3 5000
```
###### Launch remote shell
```bash
# 1)
server> nc -l 5000 -e /bin/bash
client> nc 10.240.30.3 5000
# 2)
server> rm -f /tmp/f; mkfifo /tmp/f
server> cat /tmp/f | /bin/bash -i 2>&1 | nc -l 127.0.0.1 5000 > /tmp/f
client> nc 10.240.30.3 5000
```
###### Simple file server
```bash
while true ; do nc -l 5000 | tar -xvf - ; done
```
###### Simple minimal HTTP Server
```bash
while true ; do nc -l -p 1500 -c 'echo -e "HTTP/1.1 200 OK\n\n $(date)"' ; done
```
###### Simple HTTP Server
> Restarts web server after each request - remove `while` condition for only single connection.
```bash
cat > index.html << __EOF__
Hello! It's a site.