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awesome-sysadmin

A curated list of amazingly awesome open source sysadmin resources inspired by Awesome PHP.
https://github.com/kahun/awesome-sysadmin

Last synced: about 15 hours ago
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  • Backups

    • Amanda - Client-server model backup tool.
    • Attic - A deduplicating backup program written in Python.
    • Bacula - Another Client-server model backup tool.
    • Bareos - A fork of Bacula backup tool.
    • Barman - Backup and Recovery Manager for disaster recovery of PostgreSQL servers.
    • Backupninja - Lightweight, extensible meta-backup system.
    • Backuppc - Client-server model backup tool with file pooling scheme.
    • Brebis - A fully automated backup checker.
    • Burp - Network backup and restore program.
    • Duplicati - Multiple backends, encryption, web-ui and multi-OS backup tool.
    • Duplicity - Encrypted bandwidth-efficient backup using the rsync algorithm.
    • FreeFileSync - Folder comparison and synchronization tool.
    • Lsyncd - File Monitor which spawns a process to synchronize the changes (rsync by default).
    • Rsnapshot - Filesystem Snapshotting Utility.
    • Snebu - client deduplication and transparent compression.
    • UrBackup - Another client-server backup system.
    • ZBackup - A versatile deduplicating backup tool.
    • Backup - Provides an elegant DSL in Ruby for performing backups on UNIX-like systems.
    • Backup - Provides an elegant DSL in Ruby for performing backups on UNIX-like systems.
    • Bup - Incremental backups with rolling checksums, git packfiles, de-duplication, and a FUSE filesystem.
    • SafeKeep - Centralized pull-based backup using `rdiff-backup`.
  • Build Automation

    • Apache Ant - Automation build tool, similar to make, written in Java.
    • Apache Maven - Build automation tool mainly for Java.
    • GNU Make - The most popular automation build tool for many purposes.
    • Gradle - Another open source build automation system.
  • ChatOps

    • Eggdrop - The world's most popular Open Source IRC bot, designed for flexibility and ease of use.
    • Err - A plugin based chatbot designed to be easily deployable, extensible and maintainable.
    • Hubot - A customizable, life embetterment robot.
    • Lita - A robot companion for your company's chat room.
    • KeyBase - Encrypted chat, cloud and git.
  • Cloning

    • Clonezilla - Partition and disk imaging/cloning program.
    • Fog - Another computer cloning solution.
    • Redo Backup - Easy Backup, Recovery and Restore.
  • Virtualization

    • Archipel - XMPP based virtualization management platform.
    • OpenNebula - Flexible enterprise cloud made simple.
    • Packer - A tool for creating identical machine images for multiple platforms from a single source configuration.
    • Ganeti - Cluster virtual server management software tool built on top of KVM and Xen.
    • KVM - Linux kernel virtualization infrastructure.
    • oVirt - Manages virtual machines, storage and virtual networks.
    • Proxmox VE - Complete open source virtualization management solution.
    • QEMU - QEMU is a generic and open source machine emulator and virtualizer.
    • Vagrant - Tool for building complete development environments.
    • VirtualBox - Virtualization product from Oracle Corporation.
    • Xen - Virtual machine monitor for 32/64 bit Intel / AMD (IA 64) and PowerPC 970 architectures.
    • OpenNebula - Flexible enterprise cloud made simple.
  • Cloud Computing

    • CloudStack - Cloud computing software for creating, managing, and deploying infrastructure cloud services.
    • Cobbler - Cobbler is a Linux installation server that allows for rapid setup of network installation environments.
    • Eucalyptus - Open source private cloud software with AWS compatibility.
    • Mesos - Develop and run resource-efficient distributed systems.
    • Openshift Origin - Open source upstream of OpenShift, the next generation application hosting platform developed by Red Hat.
    • OpenStack - Open source software for building private and public clouds.
    • The Foreman - Foreman is a complete lifecycle management tool for physical and virtual servers. FOSS.
    • Tsuru - Tsuru is an extensible and open source Platform as a Service software.
    • Terraform - Terraform allows you to practice infrastructure as code and is commonly used for AWS/GCE.
    • Openshift Origin - Open source upstream of OpenShift, the next generation application hosting platform developed by Red Hat.
    • Tsuru - Tsuru is an extensible and open source Platform as a Service software.
  • Cloud Orchestration

    • BOSH - IaaS orchestration platform originally written for deploying and managing Cloud Foundry PaaS, but also useful for general purpose distributed systems.
    • Ansible - Contains modules for controlling many types of cloud resources.
    • Cloudify - Open source TOSCA-based cloud orchestration software platform written in Python and YAML.
    • etcd - A highly-available key value store for shared configuration and service discovery.
    • Juju - Cloud orchestration tool which manages services as charms, YAML configuration and deployment script bundles.
    • MCollective - Ruby framework to manage server orchestration, developed by Puppet labs.
    • Rundeck - Simple orchestration tool.
    • serf - Serf is a tool for cluster membership.
    • StackStorm - Event Driven Operations and ChatOps platform for infrastructure management. Written in Python.
    • etcd - A highly-available key value store for shared configuration and service discovery.
    • Juju - Cloud orchestration tool which manages services as charms, YAML configuration and deployment script bundles.
    • Rundeck - Simple orchestration tool.
  • Service Discovery

    • Consul - Consul is a tool for service discovery, monitoring and configuration.
    • ZooKeeper - ZooKeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services.
  • Cloud Storage

    • git-annex assistant - A synchronised folder on each of your OSX and Linux computers, Android devices, removable drives, NAS appliances, and cloud services.
    • nextCloud - Provides access to your files via the web
    • ownCloud - Provides universal access to your files via the web, your computer or your mobile devices.
    • Seafile - Another Open Source Cloud Storage solution.
    • SparkleShare - Provides cloud storage and file synchronization services. By default, it uses Git as a storage backend.
    • Swift - A highly available, distributed, eventually consistent object/blob store.
    • Syncthing - Open Source system for private, encrypted and authenticated distribution of data.
    • nextCloud - Provides access to your files via the web
  • Code Review

    • Gerrit - Based on the Git version control, it facilitates software developers to review modifications to the source code and approve or reject those changes.
    • Review Board - Web-based collaborative code review tool.
    • Gerrit - Based on the Git version control, it facilitates software developers to review modifications to the source code and approve or reject those changes.
  • Project Management

    • Phabricator
    • ChiliProject - Fork of Redmine.
    • GitBucket
    • GitLab - Clone of GitHub written in Ruby.
    • Gogs - Self-hosted Git service written in Go.
    • OpenProject - Project collaboration with open source.
    • Taiga - Agile, Free, Open Source Project Management Tool based on the Kanban and Scrum methods.
    • Trac - Written in python.
    • Redmine - Written in ruby on rails.
  • Collaborative Software

    • Citadel/UX - Collaboration suite (messaging and groupware) that is descended from the Citadel family of programs.
    • EGroupware - Groupware software written in PHP.
    • Horde Groupware - PHP based collaborative software suite that includes email, calendars, wikis, time tracking and file management.
    • SOGo - Collaborative software server with a focus on simplicity and scalability.
    • Zimbra - Collaborative software suite, that includes an email server and web client.
    • Kolab - Another groupware suite.
  • Configuration Management Database

    • i-doit - Open Source IT Documentation and CMDB.
    • iTop - Complete open source, ITIL, web based service management tool.
  • Configuration Management

    • Ansible - It's written in Python and manages the nodes over SSH.
    • CFEngine - Lightweight agent system. Configuration state is specified via a declarative language.
    • Chef - It's written in Ruby and Erlang and uses a pure-Ruby DSL.
    • Pallet - Infrastructure definition, configuration and management via a Clojure DSL.
    • Puppet - It's written in Ruby and uses Puppet's declarative language or a Ruby DSL.
    • (R)?ex - It's written in Perl and use plain Perl, over SSH without agent.
    • Slaughter - It's written in Perl.
    • Puppet - It's written in Ruby and uses Puppet's declarative language or a Ruby DSL.
    • Salt - It's written in Python.
  • Continuous Integration & Continuous Deployment

    • Drone - Continuous integration server built on Docker and configured using YAML files.
    • Go - Open source continuous delivery server.
    • Jenkins - An extendable open source continuous integration server.
    • Concourse CI - A pipeline-based CI system written in Go.
    • Spinnaker - Open source, multi-cloud continuous delivery platform for releasing software changes.
    • TeamCity - Powerful Continuous Integration out of the box
    • GitLab CI - Based off of ruby. They also provide GitLab, which manages git repositories.
  • Control Panels

    • Ajenti - Control panel for Linux and BSD.
    • Cockpit - New multi-server web interface for Linux servers written in C.
    • Feathur - VPS Provisioning and Management Software.
    • Froxlor - Easy to use panel for Linux with Nginx and PHP-FPM support.
    • ISPConfig - Hosting control panel for Linux.
    • Sentora - Control panel for Linux, BSD, and Windows based on ZPanel.
    • Virtualmin - Control panel for Linux based on webmin.
    • Webmin - Linux server control panel.
    • ZPanel - Control panel for Linux, BSD, and Windows.
    • Ajenti - Control panel for Linux and BSD.
    • Virtualmin - Control panel for Linux based on webmin.
  • Deployment Automation

    • Capistrano - Deploy your application to any number of machines simultaneously, in sequence or as a rolling set via SSH (rake based).
    • Fabric - Python library and cli tool for streamlining the use of SSH for application deployment or systems administration tasks.
    • Mina - Really fast deployer and server automation tool (rake based).
    • Rocketeer - PHP task runner and deployment tool.
    • Vlad the Deployer - Deployment automation (rake based).
  • Diagramming

    • drawthe.net - Draws network diagrams dynamically from a text file describing the placement, layout and icons.
  • Distributed Filesystems

    • Ceph - Distributed object store and file system.
    • DRBD - Distributed Replicated Block Device.
    • LeoFS - Unstructured object/data storage and a highly available, distributed, eventually consistent storage system.
    • GlusterFS - Scale-out network-attached storage file system.
    • HDFS - Distributed, scalable, and portable file-system written in Java for the Hadoop framework.
    • Lustre - A type of parallel distributed file system, generally used for large-scale cluster computing.
    • MooseFS - Fault tolerant, network distributed file system.
    • MogileFS - Application level, network distributed file system.
    • OpenAFS - Distributed network file system with read-only replicas and multi-OS support.
    • TahoeLAFS - secure, decentralized, fault-tolerant, peer-to-peer distributed data store and distributed file system.
    • MogileFS - Application level, network distributed file system.
  • DNS

    • Bind - The most widely used name server software.
    • djbdns - A collection of DNS applications, including tinydns.
    • Designate - DNS REST API that support several DNS servers as its backend.
    • dnsmasq - A lightweight service providing DNS, DHCP and TFTP services to small-scale networks.
    • Knot - High performance authoritative-only DNS server.
    • NSD - Authoritative only, high performance, simple name server.
    • PowerDNS - DNS server with a variety of data storage back-ends and load balancing features.
    • Unbound - Validating, recursive, and caching DNS resolver.
    • Yadifa - Lightweight authoritative Name Server with DNSSEC capabilities powering the .eu top-level domain.
    • dnsmasq - A lightweight service providing DNS, DHCP and TFTP services to small-scale networks.
    • Yadifa - Lightweight authoritative Name Server with DNSSEC capabilities powering the .eu top-level domain.
  • Editors

    • Atom - A hackable text editor from GitHub.
    • Brackets - Open source code editor for web designers and front-end developers.
    • Eclipse - IDE written in Java with an extensible plug-in system.
    • Geany - GTK2 text editor.
    • GNU Emacs - An extensible, customizable text editor-and more.
    • Haroopad - Markdown editor with live preview.
    • ICEcoder - Code editor awesomeness, built with common web languages.
    • Light Table - The next generation code editor.
    • Lime - Aims to provide an open source solution to Sublime Text
    • SciTE - A SCIntilla based Text Editor.
    • Vim - A highly configurable text editor built to enable efficient editing.
    • Nano - A popular text editor, by default comes with most Linux distributions.
    • Visual Studio Code - Fast, hackable, multi-platform code editor from Microsoft.
  • IT Asset Management

    • GLPI - Information Resource-Manager with an additional Administration Interface.
    • OCS Inventory NG - Enables users to inventory their IT assets.
    • RackTables - Datacenter and server room asset management like document hardware assets, network addresses, space in racks, networks configuration.
    • Snipe IT - Asset & license management software.
    • OpenDCIM - A web based Data Center Infrastructure Management application.
  • LDAP

  • Log Management

    • Echofish - A web based real-time event log aggregation, analysis, monitoring and management system.
    • Fluentd - Log Collector and Shipper.
    • Flume - Distributed log collection and aggregation system.
    • Graylog2 - Pluggable Log and Event Analysis Server with Alerting options.
    • Heka - Stream processing system which may be used for log aggregation.
    • Kibana - Visualize logs and time-stamped data.
    • Logstash - Tool for managing events and logs.
    • Octopussy - Log Management Solution (Visualize / Alert / Report).
    • Graylog2 - Pluggable Log and Event Analysis Server with Alerting options.
  • Mail Servers

    • Courier IMAP/POP3 - Fast, scalable, enterprise IMAP and POP3 server.
    • Cyrus IMAP/POP3 - Intended to be run on sealed servers, where normal users are not permitted to log in.
    • Dovecot - IMAP and POP3 server written primarily with security in mind.
    • Qpopper - One of the oldest and most popular server implementations of POP3.
    • Exim - Message transfer agent (MTA) developed at the University of Cambridge.
    • Haraka - A high-performance, pluginable SMTP server written in JavaScript.
    • MailCatcher - Ruby gem that deploys a simply SMTP MTA gateway that accepts all mail and displays in web interface. Useful for debugging or development.
    • OpenSMTPD - Secure SMTP server implementation from the OpenBSD project.
    • Postfix - Fast, easy to administer, and secure Sendmail replacement.
    • Qmail - Secure Sendmail replacement.
    • Sendmail - Message transfer agent (MTA).
    • Mail-in-a-Box - Take back control of your email with this easy-to-deploy mail server in a box.
    • iRedMail - Full-featured mail server solution based on Postfix and Dovecot.
  • Messaging

    • ejabberd - XMPP instant messaging server written in Erlang/OTP.
    • Metronome IM - Fork of Prosody IM.
    • Openfire - Real time collaboration (RTC) server.
    • Prosody IM - XMPP server written in Lua.
    • Tigase - XMPP server implementation in Java.
    • Kaiwa - Web based chat client in the style of common paid alternatives.
    • Kaiwa - Web based chat client in the style of common paid alternatives.
  • Monitoring

    • Alerta - Distributed, scaleable and flexible monitoring system.
    • Canopsis - Opensource Hypervision and Data Aggregation Software
    • Cacti - Web-based network monitoring and graphing tool.
    • Cabot - Monitoring and alerts, similar to PagerDuty.
    • Centreon - IT infrastructure and application monitoring for service performance.
    • Flapjack - Monitoring notification routing & event processing system.
    • Icinga - Fork of Nagios.
    • Monit - Small Open Source utility for managing and monitoring Unix systems.
    • Munin - Networked resource monitoring tool.
    • Naemon - Network monitoring tool based on the Nagios 4 core with performance enhancements and new features.
    • Nagios - Computer system, network and infrastructure monitoring software application.
    • Node-Bell - Real-time anomalies detection for periodic time series, metrics monitor.
    • Observium - SNMP monitoring for servers and networking devices. Runs on linux.
    • Opsview - Based on Nagios 4, Opsview Core is ideal for small IT and test environments.
    • Riemann - Flexible and fast events processor allowing complex events/metrics analysis.
    • Sensu - Open source monitoring framework.
    • Sentry - Application monitoring, event logging and aggregation.
    • Serverstats - A simple tool for creating graphs using rrdtool. ([source on github](https://github.com/ddanier/serverstats))
    • Shinken - Another monitoring framework.
    • Xymon - Network monitoring inspired by Big Brother.
    • Zabbix - Enterprise-class software for monitoring of networks and applications.
    • Zenoss - Application, server, and network management platform based on Zope.
    • Adagios - Web based Nagios configuration interface.
    • Thruk - Multibackend monitoring web interface with support for Naemon, Nagios, Icinga and Shinken.
    • Uchiwa - Simple dashboard for the Sensu monitoring framework.
    • OMD - The Open Monitoring Distribution.
    • Flapjack - Monitoring notification routing & event processing system.
    • Cacti - Web-based network monitoring and graphing tool.
    • Canopsis - Opensource Hypervision and Data Aggregation Software
  • Metric & Metric Collection

    • Collectd - System statistic collection daemon.
    • Collectl - High precision system performance metrics collecting tool.
    • ~~dashing~~ - __No Longer Maintained__ - Ruby gem that allows for rapid statistical dashboard development. An all HTML5 approach allows for big screen displays in data centers or conference rooms.
    • Facette - Time series data visualization and graphing software written in Go.
    • Ganglia - High performance, scalable RRD based monitoring for grids and/or clusters of servers. Compatible with Graphite using a single collection process.
    • Grafana - A Graphite & InfluxDB Dashboard and Graph Editor.
    • Graphite - Open source scalable graphing server.
    • InfluxDB - Open source distributed time series database with no external dependencies.
    • KairosDB - Fast distributed scalable time series database, fork of OpenTSDB 1.x.
    • OpenTSDB - Store and server massive amounts of time series data without losing granularity.
    • Packetbeat - Captures network traffic and displays it in a custom Kibana dashboard for easy viewing.
    • Prometheus - Service monitoring system and time series database.
    • RRDtool - Open source industry standard, high performance data logging and graphing system for time series data.
    • Statsd - Application statistic listener.
    • Grafana - A Graphite & InfluxDB Dashboard and Graph Editor.
    • NetData - Distributed real-time performance and health monitoring.
  • Network Configuration Management

    • GestióIP - An automated web based IPv4/IPv6 IP Address Management tool.
    • NOC Project - Scalable, high-performance and open-source [OSS](http://en.wikipedia.org/wiki/Operations_support_system) system for ISP, service and content providers.
    • phpIPAM - Open source IP address management with [PowerDNS](https://www.powerdns.com/) integration.
    • RANCID - Monitors network device's configuration and maintain history of changes.
    • rConfig - Another network device configuration management tool.
    • Netbox - IP address management (IPAM) and data center infrastructure management (DCIM) tool.
  • Newsletters

    • DadaMail - Mailing List Manager, written in Perl.
    • phpList - Newsletter manager written in PHP.
    • Servers for Hackers - Newsletter for programmers who find themselves needing to know their way around a server.
    • DevOpsLinks - A community of DevOps, SysAdmin & Developers with a weekly newsletter and a team chat.
  • NoSQL

    • Apache HBase - Hadoop database, a distributed, big data store.
    • Cassandra - Distributed DBMS designed to handle large amounts of data across many servers.
    • CouchDB - Ease of use, with multi-master replication document-oriented database system.
    • MongoDB - Another document-oriented database system.
    • RavenDB - Document based database with ACID/Transactional features.
    • RethinkDB - Open source distributed document store database, focuses on JSON.
    • FlockDB - Twitter's distributed, fault-tolerant graph database.
    • Couchbase - In-memory, replicated, peristent key/value datastore.
    • Redis - Networked, in-memory, key-value data store with optional durability.
    • Riak - Another fault-tolerant key-value NoSQL database.
    • Couchbase - In-memory, replicated, peristent key/value datastore.
  • Packaging

    • packman - Full stack, cross distro packaging software (Python).
  • Queuing

    • ActiveMQ - An open source message broker written in Java together with a full JMS client.
    • Gearman - Fast multi-language queuing/job processing platform.
    • Kafka - A high-throughput distributed messaging system.
    • NSQ - A realtime distributed messaging platform.
    • RabbitMQ - Robust, fully featured, cross distro queuing system.
    • ZeroMQ - High-performance asynchronous messaging library.
    • ActiveMQ - An open source message broker written in Java together with a full JMS client.
  • RDBMS

    • Firebird - True universal open source database.
    • Galera - Galera Cluster for MySQL is an easy-to-use high-availability solution with high system up-time, no data loss, and scalability for future growth.
    • MariaDB - Community-developed fork of the MySQL.
    • Percona Server - Enhanced, drop-in MySQL replacement.
    • PostgreSQL - Object-relational database management system (ORDBMS).
    • PostgreSQL-XL - Scalable Open Source PostgreSQL-based database cluster.
    • SQLite - Library that implements a self-contained, serverless, zero-configuration, transactional SQL DBS.
    • PostgreSQL-XL - Scalable Open Source PostgreSQL-based database cluster.
  • Security

    • Denyhosts - Thwart SSH dictionary based attacks and brute force attacks.
    • Fail2Ban - Scans log files and takes action on IPs that show malicious behavior.
    • fwknop - Protects ports via Single Packet Authorization in your firewall.
    • Glastopf - A low-interaction web application honeypot to emulate vulnerabilities and gather attack data.
    • OSSEC - OSSEC is a HIDS that performs log analysis, FIM, rootkit detection, and much more.
    • OSQuery - Query your servers status and info using a SQL like interface.
    • pfSense - Firewall and Router FreeBSD distribution.
    • Snort - Snort is a free and open source network intrusion prevention system (NIPS) and network intrusion detection system (NIDS) created by Martin Roesch in 1998.
    • SpamAssassin - A powerful and popular email spam filter employing a variety of detection technique.
    • BounCA - BounCA is a personal SSL / Certificate Authority Key management tool. Create self-signed SSL certificates via your browser. ([Source Code](https://github.com/repleo/bounca)) `Apache` `Python`
  • Software Containers

    • Bitnami - Produces open source installers or software packages for web applications and development stacks as well as virtual appliances.
    • Docker - Open platform for developers and sysadmins to build, ship, and run distributed applications.
    • LXC - Userspace interface for the Linux kernel containment features.
    • LXD - LXD is a container "hypervisor".
    • OpenVZ - Container-based virtualization for Linux.
    • Docker Compose - Fast, isolated development environments using Docker.
    • Singularity - Flexible containers without root.
    • Docker - Open platform for developers and sysadmins to build, ship, and run distributed applications.
  • SSH

    • Advanced SSH config - Enhances ssh_config file capabilities, completely transparent.
    • autossh - Automatically respawn ssh session after network interruption.
    • Cluster SSH - Controls a number of xterm windows via a single graphical console.
    • DSH - Dancer's shell / distributed shell - Wrapper for executing multiple remote shell commands from one command line.
    • parallel-ssh - Provides parallel versions of OpenSSH and related tools.
    • pdsh - Pdsh is a high-performance, parallel remote shell utility.
    • SSH Power Tool - Execute commands and upload files to many servers simultaneously without using pre-shared keys.
    • sshrc - sources ~/.sshrc on your local computer after logging in remotely.
    • stormssh - A command line tool to manage SSH connections.
  • Statistics

    • Analog - Logfile Analyser.
    • AWStats - Generates web, streaming, ftp or mail server statistics graphically.
    • GoAccess - Real-time web log analyzer and interactive viewer that runs in a terminal.
    • Open Web Analytics - Add web analytics to websites using JS, PHP or REST APIs.
    • Piwik - Web analytics application.
    • Webalizer - Fast, free web server log file analysis program.
  • Status Pages

    • Cachet - An open source status page system written in PHP.
  • Ticketing systems

    • Bugzilla - General-purpose bugtracker and testing tool originally developed and used by the Mozilla project.
    • Cerb - Group-based e-mail management project.
    • MantisBT - Web-based bug tracking system.
    • osTicket - Simple support ticket system.
    • OTRS - Trouble ticket system for assigning tickets to incoming queries and tracking further communications.
    • Request Tracker - Ticket-tracking system written in Perl.
    • TheBugGenie - Ticket system with extensive user rights system.
    • OTRS - Trouble ticket system for assigning tickets to incoming queries and tracking further communications.
  • Troubleshooting

    • mitmproxy - A Python tool used for intercepting, viewing and modifying network traffic. Invaluable in troubleshooting certain problems.
    • Sysdig - Capture system state and activity from a running Linux instance, then save, filter and analyze.
    • Wireshark - The world's foremost network protocol analyzer.
    • Trinity Rescue Kit - Linux Live CD for general computer troubleshooting.
    • Sysdig - Capture system state and activity from a running Linux instance, then save, filter and analyze.
    • Trinity Rescue Kit - Linux Live CD for general computer troubleshooting.
  • Version control

    • Fossil - Distributed version control with built-in wiki and bug tracking.
    • Git - Distributed revision control and source code management (SCM) with an emphasis on speed.
    • GNU Bazaar - Distributed revision control system sponsored by Canonical.
    • Mercurial - Another distributed revision control.
    • Subversion - Client-server revision control system.
  • VPN

    • OpenVPN - Uses a custom security protocol that utilizes SSL/TLS for key exchange.
    • Pritunl - OpenVPN based solution. Easy to set up.
    • SoftEther - Multi-protocol software VPN with advanced features
    • strongSwan - Complete IPsec implementation for Linux.
    • tinc - Distributed p2p VPN.
    • wireguard - New minimal VPN Solution that is very fast.
  • Web

    • Apache - Most popular web server.
    • Caddy - The HTTP/2 Web Server with Fully Managed TLS.
    • Cherokee - Lightweight, high-performance web server/reverse proxy.
    • Lighttpd - Web server more optimized for speed-critical environments.
    • Nginx - Reverse proxy, load balancer, HTTP cache, and web server.
    • HAProxy - Software based load Balancing, SSL offloading and performance optimization, compression, and general web routing.
    • Squid - Caching proxy for the web supporting HTTP, HTTPS, FTP, and more.
    • Varnish - HTTP based web application accelerator focusing on optimizing caching and compression.
    • Traefik - Træfɪk is a modern HTTP reverse proxy and load balancer made to deploy microservices with ease.
  • Webmails

    • Mailpile - A modern, fast web-mail client with user-friendly encryption and privacy features.
    • Roundcube - Browser-based IMAP client with an application-like user interface.
    • SquirrelMail - Another browser-based IMAP client.
  • Wikis

    • BookStack - A simple, user-friendly wiki built with PHP that uses MySQL for storage.
    • DokuWiki - Simple to use and highly versatile wiki that doesn't require a database.
    • ikiwiki - A wiki compiler.
    • MediaWiki - Used to power Wikipedia.
    • MoinMoin - An advanced, easy to use and extensible WikiEngine with a large community of users.
    • TiddlyWiki - Complete interactive wiki in JavaScript.
  • Blogs

  • Books

  • Repositories

    • Dotdeb - Repository with LAMP updated packages for Debian.
    • EPEL - Repository for RHEL and compatibles (CentOS, Scientific Linux).
    • Remi - Repository with LAMP updated packages for RHEL/Centos/Fedora.
    • Software Collections - Community Release of [Red Hat Software Collections](https://access.redhat.com/documentation/en-US/Red_Hat_Software_Collections/). Provides updated packages of Ruby, Python, etc. for CentOS/Scientific Linux 6.x.
    • Software Collections - Community Release of [Red Hat Software Collections](https://access.redhat.com/documentation/en-US/Red_Hat_Software_Collections/). Provides updated packages of Ruby, Python, etc. for CentOS/Scientific Linux 6.x.
    • Software Collections - Community Release of [Red Hat Software Collections](https://access.redhat.com/documentation/en-US/Red_Hat_Software_Collections/). Provides updated packages of Ruby, Python, etc. for CentOS/Scientific Linux 6.x.
  • Websites

    • Ops School - Comprehensive program that will help you learn to be an operations engineer.
    • Digital Ocean Tutorials - A surprisingly vast resource for getting the basics of certain applications, tools, or even systems administration topics.