https://github.com/timintech/essential-linux-commands
A collection of essential Linux commands and system administration guides for beginners and advanced users.
https://github.com/timintech/essential-linux-commands
bash debian linux linux-commands linux-guide linux-mint terminal
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A collection of essential Linux commands and system administration guides for beginners and advanced users.
- Host: GitHub
- URL: https://github.com/timintech/essential-linux-commands
- Owner: TimInTech
- Created: 2024-12-25T18:48:52.000Z (6 months ago)
- Default Branch: main
- Last Pushed: 2025-03-11T06:27:18.000Z (3 months ago)
- Last Synced: 2025-03-27T16:56:49.888Z (3 months ago)
- Topics: bash, debian, linux, linux-commands, linux-guide, linux-mint, terminal
- Homepage:
- Size: 28.3 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# 📖 Essential Linux System Commands & Guides
Welcome to the **Essential Linux System Commands & Guides** repository! 🚀
This repository contains an extensive collection of Linux commands for efficient system management, troubleshooting, and automation.
## 📌 Features
✅ Covers **system updates, disk management, software installation, networking, and cleanup tasks**
✅ Beginner-friendly with clear explanations and command examples
✅ Useful for **Sysadmins, DevOps, and Linux enthusiasts**
---
## 🛠 Key Sections
### 🔹 System Updates & Upgrades
Manage updates and keep your system secure.
- **Update package lists:**
```bash
sudo apt update
```
This command refreshes the package lists, ensuring the system has the latest information about available updates.
- **Upgrade all installed packages:**
```bash
sudo apt upgrade -y
```
Installs all available updates for the system. It is recommended to run this command regularly.
- **Upgrade the distribution (if necessary):**
```bash
sudo apt dist-upgrade
```
This command upgrades the system and makes necessary changes to dependencies that a simple upgrade might not address.
- **Manually install a `.deb` package:**
```bash
sudo dpkg -i [filename.deb]
```
Replace `[filename.deb]` with the actual file name. This command is used to install locally downloaded `.deb` packages.
---
### 🔹 Disk Management
- **List attached drives:**
```bash
lsblk
```
Displays all available drives and partitions. Very useful for seeing which devices are connected.
- **Check and repair a disk:**
```bash
sudo fsck /dev/sdX
```
Replace `sdX` with the drive name. This command checks the file system for errors and repairs them if possible.
- **Check disk space usage:**
```bash
df -h
```
Displays available and used storage space on all drives in a human-readable format.
---
### 🔹 System Maintenance & Cleanup
- **Remove unnecessary packages:**
```bash
sudo apt autoremove
```
Removes packages that are no longer needed, such as old kernel versions or libraries.
- **Clean package cache:**
```bash
sudo apt autoclean
```
Deletes old package files that are no longer required.
- **Clear all cached packages:**
```bash
sudo apt clean
```
Completely removes all stored package files from the cache.
- **Delete old system logs:**
```bash
sudo journalctl --vacuum-time=2weeks
```
Removes logs older than two weeks to free up disk space.
---
### 🔹 Network Diagnostics
- **Show IP addresses:**
```bash
ip a
```
Displays all active network adapters and their configurations.
- **Perform a ping test:**
```bash
ping google.com
```
Checks the connection to a target address.
- **Scan a network for devices using Nmap:**
```bash
sudo apt install nmap
nmap 192.168.1.0/24
```
Scans a network for active devices and open ports.
- **Check route to a destination server:**
```bash
sudo apt install traceroute
traceroute google.com
```
Shows the path that network packets take to reach a remote host.
---
### 🔹 Software Installation
- **Install a package using APT:**
```bash
sudo apt install [package_name]
```
Installs an application from the official repositories.
- **Remove a package:**
```bash
sudo apt remove [package_name]
```
Uninstalls an application but keeps configuration files.
- **Completely remove a package and its config files:**
```bash
sudo apt purge [package_name]
```
- **Install Snap packages:**
```bash
sudo snap install [package_name]
```
Snap packages are universal and work on all Linux distributions.
---
### 🔹 Advanced System Tools
- **Timeshift (System Backups):**
```bash
sudo apt install timeshift
```
Allows creating system snapshots for easy recovery.
- **Htop (System Monitoring):**
```bash
sudo apt install htop
```
An interactive tool for monitoring system resources like CPU and memory usage.
- **BleachBit (System Cleanup):**
```bash
sudo apt install bleachbit
```
Removes temporary files and frees up storage space.
---
## 📬 Contact
💬 **Email:** [email protected]
🌍 **GitHub:** [TimInTech](https://github.com/TimInTech)