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 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.

Sep 6, 2026 • 13 min read

ls Command in Linux: List Files and Directories

The ls command lists files and directories in Linux. See how to use ls -l, ls -al, hidden-file options, sorting, and other practical combinations.

Sep 6, 2026 • 7 min read

Find Large Files in Linux: Using find and du

Find the largest files and directories in Linux using the find and du commands. Includes practical examples for sorting by size and cleaning up disk space.

Terminal showing large files found with the find command in Linux

Sep 6, 2026 • 7 min read

Cron Every 5 Minutes: 5, 10, and 15-Minute Crontab Examples

Run cron every 5 minutes with */5 * * * *. This guide also covers 10 and 15-minute crontab expressions, testing, logging, and overlap prevention.

Sep 5, 2026 • 7 min read • new

btop Command in Linux: Monitor System Resources

Monitor CPU, memory, disks, network traffic, and processes with btop. This guide covers installation, keyboard shortcuts, process actions, and configuration.

btop terminal dashboard with CPU, memory, disk, network, and process monitoring panels

Sep 5, 2026 • 8 min read • series

Bash source Command: Load Scripts and Variables

Use source (or its dot shorthand) to run a file in your current shell, reload .bashrc, share functions between scripts, and load variables from a config file.