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

May 18, 2026 • 10 min read

Best Linux Distributions for Every Use Case

A practical comparison of the best Linux distributions for beginners, developers, servers, gaming, and security testing.

Apr 19, 2026 • 6 min read

Bash Heredoc: Complete Guide with Examples

Bash heredoc lets you pass multi-line text directly to a command inside a shell script. This guide covers syntax, variable expansion, indentation with <<-, SSH usage, and common mistakes.

Jul 27, 2026 • 6 min read

How to Install Docker on Ubuntu 26.04

Install Docker on Ubuntu 26.04 from the official Docker repository. Covers repository setup, verification, running without sudo, updates, and uninstall steps.

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Jul 29, 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.

Jul 29, 2026 • 13 min read

How to Install Ubuntu 26.04

Step-by-step instructions for installing Ubuntu 26.04 from a bootable USB drive, covering ISO download, installer screens, disk setup, and first boot.

Jul 29, 2026 • 10 min read • new

How to Install Kubernetes with kubeadm on Ubuntu 26.04

Install Kubernetes 1.36 on Ubuntu 26.04 with kubeadm and containerd, configure Flannel networking, join worker nodes, and verify the cluster.

Kubernetes control plane and worker nodes installed with kubeadm on Ubuntu 26.04

Jul 28, 2026 • 7 min read

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.

Jul 28, 2026 • 6 min read • series

Bash Positional Arguments: How to Use $1, $2, $@, and shift

Learn how Bash positional arguments work, including $0, $1, $#, "$@", "$*", shift, default values, and function arguments in scripts.

Jul 28, 2026 • 13 min read • series

How to Parse Command-Line Options in Bash with getopts

Parse short options in Bash scripts with getopts: option strings, OPTARG and OPTIND, silent error handling, long-option workarounds, and complete script examples.

Jul 28, 2026 • 8 min read • series

Install and Integrate Rspamd on Ubuntu 26.04

Install Rspamd on Ubuntu 26.04, connect it to Postfix as a milter, configure Redis, and publish DKIM and DMARC records for your mail domain.

Rspamd mail filtering and DKIM signing illustration

Jul 27, 2026 • 7 min read

How to Upgrade to Ubuntu 26.04

Upgrade Ubuntu 25.10 or 24.04 LTS to Ubuntu 26.04 Resolute Raccoon, including the early command-line path before the 26.04.1 point release.

Jul 27, 2026 • 6 min read

How to Install PHP on Ubuntu 26.04

Learn how to install PHP 8.5 on Ubuntu 26.04 with Apache or Nginx. Includes PHP-FPM setup, common extensions, and installing other PHP versions.

Jul 27, 2026 • 6 min read

How to Install Docker on Ubuntu 26.04

Install Docker on Ubuntu 26.04 from the official Docker repository. Covers repository setup, verification, running without sudo, updates, and uninstall steps.