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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Apr 4, 2026 • 6 min read

Bash Functions

How to define and use Bash functions, pass arguments, return values, and apply best practices for writing cleaner and more maintainable scripts.

May 16, 2026 • 8 min read

How to Use wget in Linux with Examples

Step-by-step wget tutorial covering downloads, resuming, recursive mirroring, authentication, and the most useful options.

May 1, 2026 • 4 min read

How to Show Line Numbers in Vim and Vi

Display line numbers in Vim or Vi for the current session, make them permanent in .vimrc, and switch between absolute, relative, and hybrid numbering.

Linuxize Weekly Newsletter

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

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Jun 6, 2026 • 3 min read

How to Set Up Automatic Kernel Updates on Linux

Set up automatic, rebootless Linux kernel updates with live patching from Canonical Livepatch (Ubuntu Pro), and learn when unattended upgrades are enough.

Jun 6, 2026 • 9 min read

How to Fix the WordPress White Screen of Death

Troubleshoot the WordPress White Screen of Death by using Recovery Mode, disabling plugins and themes, checking PHP errors, raising memory limits, and restoring access.

Blank white WordPress page caused by a PHP fatal error

Jun 6, 2026 • 8 min read

What Is an SSL/TLS Certificate and How Does It Work?

An SSL/TLS certificate proves a website's identity and encrypts traffic between the browser and the server. This guide explains how certificates work, what they contain, and the types available.

Diagram of an SSL/TLS certificate securing traffic between a browser and a web server

Jun 6, 2026 • 8 min read • new

How to Use OpenSSL: Generate Keys, Certificates, and Test TLS

Practical OpenSSL guide for Linux: generate private keys, create CSRs and self-signed certificates, convert formats, inspect certificates, and test TLS connections.

Generating keys and certificates with OpenSSL in a Linux terminal

Jun 5, 2026 • 7 min read • new

npm Command: Install and Manage Node.js Packages

This npm command guide covers project setup, local and global package installs, npm ci, updates, dependency removal, scripts, and one-off package runs.

Managing Node.js packages with the npm command in a Linux terminal

Jun 4, 2026 • 5 min read • new

Fix "sudo: command not found" on Linux

How to fix the 'sudo: command not found' error on Linux by installing the sudo package, adding your user to the right group, and recovering from a broken PATH.

Fixing the sudo command not found error on Linux

Jun 3, 2026 • 10 min read • new

Podman vs Docker: Differences and Migration Guide

This guide compares Podman and Docker across architecture, rootless containers, systemd integration, Compose workflows, image builds, and migration planning.

Jun 3, 2026 • 10 min read

How to Back Up and Restore MySQL Databases with Mysqldump

Step-by-step guide to backing up and restoring MySQL and MariaDB databases using the mysqldump utility. Covers single and full backups, compressed backups, restoring dumps, and automating backups with cron.

Backing up and restoring MySQL databases with mysqldump from the command line

Jun 2, 2026 • 5 min read • new

pip vs apt: Installing Python Packages on Linux

This guide explains when to use pip or apt for Python packages on Ubuntu and Debian, why sudo pip install is risky, and where virtual environments fit.