Practical Linux Tutorials and Command-Line Guides

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

Featured Articles

Oct 19, 2026 • 11 min read

Netcat (nc) Command in Linux with Examples

Netcat (nc) command examples for Linux: check a port with nc -zv, scan port ranges, open listeners, transfer files, and set timeouts with -w.

Aug 8, 2026 • 7 min read

How to Show Line Numbers in Vim and Vi

Turn on line numbers in Vim or Vi for the current session, set them by default in .vimrc or init.lua, and switch between absolute, relative, and hybrid numbering.

Sep 26, 2026 • 10 min read

Using the SSH Config File

Set up the SSH client config file to manage multiple remote connections with custom hostnames, users, ports, keys, and jump hosts, all without long command-line flags.

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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.

Nov 10, 2026 • 11 min read • series

chmod 777: What It Means and Why You Should Never Use It

chmod 777 grants every user full control of a file or directory. See why it is risky and when to use safer 755 or 644 permissions instead.

The word chmod above three colored sevens, one each for owner, group, and others

Nov 10, 2026 • 9 min read • new

How to Install phpMyAdmin on Ubuntu 26.04

Install phpMyAdmin on Ubuntu 26.04 with Apache or Nginx, create a MySQL login, restrict access, and fix localhost/phpmyadmin not found errors.

Illustrated browser with database tables beside a database cabinet and a key

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.

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

Nov 9, 2026 • 8 min read • new

Docker CMD vs ENTRYPOINT: Differences Explained

Compare Docker CMD and ENTRYPOINT with working Dockerfile examples, runtime overrides, shell vs exec form, signal handling, and Docker Compose.

Docker ENTRYPOINT executable block beside replaceable CMD argument cards

Nov 9, 2026 • 6 min read

id Command in Linux: Display User and Group Information

Use the id command to print a user's UID, GID, and group memberships, get single values for shell scripts, and see why a newly added group does not show up yet.

Nov 8, 2026 • 6 min read

How to Use the pkill Command in Linux

The pkill command sends signals to Linux processes by name, user, terminal, or full command pattern. Covers safe matching, common options, and examples.

Nov 8, 2026 • 4 min read

How to Set or Change Timezone on Ubuntu Server and Desktop

Check the current time zone on Ubuntu and change it permanently with timedatectl, or switch it from the Date & Time panel on Ubuntu Desktop.

Nov 8, 2026 • 8 min read

pgrep Command in Linux: Find and Filter Running Processes

The pgrep command finds running processes by regex pattern, user, terminal, or parent PID and prints matching PIDs. This guide covers exact matching, filtering options, and script-friendly exit checks.