Practical Linux Tutorials and Command-Line Guides

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

Featured Articles

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

Jul 17, 2026 • 4 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.

Mar 9, 2026 • 7 min read

Find and Replace in Vim / Vi

Step-by-step guide to finding and replacing text in Vim using the :substitute command. Covers ranges, flags, regex, case sensitivity, and practical examples.

Using the rsync command to sync files and directories in Linux

Feb 23, 2026 • 7 min read

Rsync Command in Linux with Examples

Learn how to use the rsync command to sync files and directories locally and remotely. Covers common options, remote transfers, dry run, exclusions, and troubleshooting.

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Latest Articles

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Sep 10, 2026 • 5 min read • series

How to Run Sudo Command Without Password

Configure the sudoers file or a drop-in file in /etc/sudoers.d to let a user or group run sudo commands without a password prompt.

Sep 10, 2026 • 14 min read

How to Install and Use uv: Fast Python Package Manager

Install uv on Ubuntu, Debian, and other Linux distributions, then use it to create projects, add dependencies, manage virtual environments, and install Python versions.

Installing and using uv, a fast Python package manager, on Linux

Sep 10, 2026 • 7 min read

How to Add User to Sudoers in Debian

Grant sudo privileges in Debian by adding a user to the sudo group or configuring a custom sudoers rule with visudo. Covers Debian 12 and 13.

Sep 10, 2026 • 10 min read

How to Add a User to Sudoers in Ubuntu

Grant sudo privileges in Ubuntu by adding a user to the sudo group or editing the sudoers file. Step-by-step examples and common errors.

Sep 10, 2026 • 7 min read • series

How to Enable SSH on Ubuntu

Enable SSH on Ubuntu by installing OpenSSH Server, checking the correct systemd unit, allowing it through UFW, and connecting from Linux, macOS, or Windows.

Sep 9, 2026 • 8 min read • new

How to Fix APT and dpkg Lock Errors on Ubuntu and Debian

Resolve APT and dpkg lock errors safely on Ubuntu and Debian by finding the process holding the lock and repairing interrupted package operations.

APT and dpkg package operations waiting at a shared package lock

Sep 9, 2026 • 7 min read

How to Start, Stop, and Restart Apache on Linux

Manage the Apache web server with systemctl on Ubuntu, Debian, Fedora, and RHEL. Covers start, stop, restart, reload, status, enable on boot, and config testing.

Start, stop, and restart the Apache web server on Linux

Sep 9, 2026 • 10 min read • series

Bash For Loop: Syntax and Examples

A complete guide to the Bash for loop: standard syntax, C-style loops, arrays, ranges, break and continue, and real-world scripting examples.

Bash for loop syntax examples in a terminal

Sep 9, 2026 • 6 min read

How to Start, Stop, or Restart Nginx

Learn how to start, stop, restart, and reload Nginx using systemctl on Linux. Includes the reload vs restart difference, configuration testing, and autostart setup.

Sep 7, 2026 • 9 min read • new

vmstat Command in Linux: Memory, CPU, and I/O Statistics

Use vmstat to monitor Linux CPU, memory, swap, processes, and disk I/O. This guide explains each column, live sampling, timestamps, and disk statistics.