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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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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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.

Folded vmstat statistics panels representing processes, memory, swap, I/O, system, and CPU data

Sep 7, 2026 • 7 min read

rm Command in Linux: Remove Files and Directories

Use the rm command in Linux to delete files and directories, with examples for recursive removal, force mode, prompts, glob patterns, and safer rm -rf usage.

Using the rm command to remove files and directories in Linux

Sep 7, 2026 • 5 min read

lsmod Command in Linux: List Kernel Modules

Display all currently loaded Linux kernel modules with lsmod. This guide covers output format, filtering, and related module management commands.

Stylized grid of interconnected kernel modules above the text lsmod command

Sep 7, 2026 • 16 min read

How to Remove (Delete) Files and Directories in Linux

Delete files and directories in Linux with rm, rmdir, unlink, and shred, plus bulk removal with find, safer confirmation prompts, and recoverable deletion.

Delete (Remove) Files and Directories Using Linux Command Line

Sep 7, 2026 • 7 min read • series

ssh-copy-id Command: Copy SSH Keys to a Remote Server

How to use the ssh-copy-id command to copy your SSH public key to a remote server and set up passwordless login. Covers options, a manual fallback, and common errors.