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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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.

Create Users in Linux Using the useradd Command

Mar 10, 2026 • 10 min read

How to Create Users in Linux (useradd Command)

Learn how to create and add users in Linux with the useradd command, including home directories, passwords, groups, shells, UIDs, and other common account options.

Apr 19, 2026 • 5 min read

apt Command in Linux

The apt command manages packages on Ubuntu, Debian, and related distributions. This guide covers the essential commands for installing, upgrading, removing, and searching packages.

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Jun 23, 2026 • 4 min read

How to Comment in Python

Comments make Python code easier to read and maintain. This guide explains how to write single-line comments, multiline comments, docstrings, and the shebang line.

Hash symbol above the text Python Comments on a teal background

Jun 23, 2026 • 8 min read • new

How to Install Caddy on Ubuntu 26.04

Install Caddy on Ubuntu 26.04 from the official repository, then configure automatic HTTPS, static sites, reverse proxying, systemd, and logs.

Caddy server stack with Ubuntu 26.04 and automatic HTTPS

Jun 22, 2026 • 4 min read

How to Check if a File or Directory Exists in Python

Check whether a file or directory exists in Python using pathlib, os.path, or try-except, with examples that avoid race conditions.

Jun 22, 2026 • 4 min read • new

curl vs wget: Differences and When to Use Each

Compare curl vs wget defaults, protocols, redirects, recursive downloads, API requests, and resume options to choose the right command for each task.

Comparing the curl and wget commands for downloading files

Jun 21, 2026 • 13 min read • new

PostgreSQL Backup and Restore with pg_dump and pg_restore

Use pg_dump, pg_restore, and pg_dumpall to back up and restore PostgreSQL databases, including custom formats, parallel jobs, remote hosts, and test restores.

Database archive with bidirectional arrows illustrating PostgreSQL backup and restore

Jun 21, 2026 • 5 min read

How to Install pip on Debian 11, 12, and 13

Step-by-step instructions for installing pip3 on Debian 11, 12, and 13 using apt, with examples for installing, upgrading, and removing Python packages.

Install Python pip on Debian 11, 12, and 13

Jun 20, 2026 • 5 min read

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.

pip and apt package manager cards for Python packages on Linux

Jun 20, 2026 • 4 min read

How to Install Python Pip on Ubuntu

Install pip on Ubuntu with a single apt command. Covers python3-pip setup, virtual environments, and common pip commands for managing Python packages.

Jun 20, 2026 • 5 min read • series

/etc/passwd in Linux: File Format and Fields Explained

The cat /etc/passwd command displays local Linux accounts. This guide explains its seven fields and when to use getent passwd instead.

Padlock illustration labeled /etc/passwd

Jun 20, 2026 • 7 min read • series

Bash Exit Command and Exit Codes

The Bash exit command terminates a shell or script and returns an exit code. This guide covers exit status, the $? variable, exit code conventions, set -e, and practical script examples.