Practical Linux Tutorials and Command-Line Guides

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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 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.

Using the Bash source command to load scripts and variables

Sep 5, 2026 • 8 min read

Listing Linux Services with systemctl

Use the systemctl command to list running, failed, and enabled Linux services. Includes filtering by state, checking status, and listing unit files.

Terminal output of systemctl list-units showing loaded Linux services

Sep 3, 2026 • 13 min read

Crontab: Scheduling Cron Jobs in Linux

Cron is a Linux scheduling daemon that runs tasks at defined intervals. This guide explains crontab syntax, operators, predefined macros, environment variables, and practical scheduling examples.

Crontab cron job scheduling syntax and examples in Linux

Sep 3, 2026 • 11 min read

CPU Info on Linux: Check CPU Details from the Command Line

Read CPU model, core and thread counts, cache sizes, and virtualization support on Linux from the command line with /proc/cpuinfo, lscpu, and dmidecode.

Checking CPU information on Linux using lscpu and /proc/cpuinfo

Sep 3, 2026 • 11 min read

ps Command in Linux: ps aux and Common Options

Use ps aux and related ps command options in Linux to list running processes, read output columns, sort by CPU or memory, filter by PID or user, and show full command lines.

Using the ps aux command to list Linux processes

Sep 2, 2026 • 11 min read

Check Open Ports in Linux: nmap, netcat, and Bash

Scan a Linux host or remote server for open ports with nmap, netcat, telnet, and Bash /dev/tcp, then distinguish closed ports from filtered connections.