Practical Linux Tutorials and Command-Line Guides

Search hundreds of step-by-step tutorials for Bash, Ubuntu, networking, security, and more.

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Linux desktop environments and terminal panels arranged around a modern workstation

Aug 31, 2026 • 13 min read

Best Linux Distros for Every Use Case in 2026

Compare the best Linux distros for beginners, gaming, servers, and security testing, with current versions and a straight answer on which one to install first.

Use SCP Command to Securely Transfer Files

Sep 23, 2026 • 10 min read

scp Command in Linux: Secure File Transfer Examples

SCP copies files securely between local and remote hosts over SSH. This guide covers syntax, uploads, downloads, custom ports, and the options you need for everyday transfers.

GZ file icon beside the text unzip .gz file on a yellow background

Nov 9, 2026 • 5 min read

How to Unzip a .gz File in Linux

Unzip a .gz file in Linux with gzip or gunzip, keep the original file when needed, and extract .tar.gz archives with tar.

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A quick weekly roundup of new tutorials, news, and tips.

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Nov 12, 2026 • 12 min read

wget Command in Linux: Download Files with Examples

Use wget to download files on Linux, resume interrupted transfers, save files to a directory, and mirror websites, with practical command examples.

Nov 12, 2026 • 11 min read • new

Fix 502 Bad Gateway Error in Nginx

Diagnose Nginx 502 Bad Gateway errors using the error log. Fix refused connections, PHP-FPM sockets, permissions, and oversized upstream headers.

Green Nginx emblem linked by a broken connection to a 502 response card on a sage background

Nov 12, 2026 • 8 min read • series

Understanding the /etc/shadow File in Linux

The /etc/shadow file stores hashed passwords and password aging data for each user on a Linux system. This guide explains the file format, hash types, field meanings, and how to query password information safely.

Nov 12, 2026 • 12 min read

nslookup Command in Linux: Query DNS Records

Query A, AAAA, MX, NS, and TXT records with nslookup, run reverse lookups, install it on Debian and Ubuntu, and read NXDOMAIN, No answer, and timeout errors.

nslookup command querying DNS records in a Linux terminal

Nov 11, 2026 • 7 min read • series

export Command in Linux: Set Bash Environment Variables

Use export to turn Bash shell variables into environment variables that child processes inherit, list exported variables, and make them permanent across sessions.

Developer using the export command in a Linux terminal beside the Tux mascot

Nov 11, 2026 • 13 min read

mv Command in Linux: Move Files and Directories

Move and rename files and directories in Linux with the mv command, including overwrite prompts, backups, the -T option, and cross-filesystem moves.

Move Files and Directories in Linux - mv Command

Nov 11, 2026 • 7 min read

git stash: Save and Restore Uncommitted Changes

Use git stash to set aside uncommitted changes, switch branches, and bring the work back later. Includes applying a specific stash, stashing untracked files, and fixing pop conflicts.

Nov 11, 2026 • 9 min read • new

How to Install OpenAI Codex CLI on Linux

Install OpenAI Codex CLI on Linux with the standalone installer or npm, sign in with ChatGPT or an API key, and run your first task in a project.

Illustrated Codex terminal beside source files, a reviewed code change, and a pencil on a textured ochre background

Nov 10, 2026 • 17 min read • series

Linux File Permissions Explained

Linux file permissions control who can read, write, and execute files and directories. Learn how to inspect and change permissions with ls, stat, and chmod.

Blue folder holding documents, titled Linux File Permissions

Nov 10, 2026 • 9 min read

How to Upgrade Debian 12 to Debian 13 Trixie

Step-by-step instructions for upgrading Debian 12 Bookworm to Debian 13 Trixie, including sources.list changes, package upgrades, and post-upgrade verification.