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 1, 2026 • 7 min read

Netcat (nc) Command in Linux with Examples

Use the Netcat nc command in Linux to scan ports, listen for connections, transfer files, test TCP and UDP services, and set connection timeouts.

Use SCP Command to Securely Transfer Files

Apr 24, 2026 • 7 min read

scp Command in Linux: Secure File Transfer Examples

SCP copies files securely between local and remote hosts over SSH. This guide covers syntax, common options, and practical examples for everyday file transfers.

Mar 11, 2026 • 8 min read

Using the SSH Config File

Set up the SSH client config file to manage multiple remote connections with custom hostnames, users, ports, keys, and jump hosts — all without long command-line flags.

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A quick weekly roundup of new tutorials, news, and tips.

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Jul 6, 2026 • 8 min read

How to Extract (Unzip) tar.gz Files in Linux

Extract tar.gz and tgz archives with the tar command. Covers extracting to a directory, pulling specific files, wildcards, stdin piping, and listing archive contents.

Extracting tar.gz files in Linux with the tar command

Jul 6, 2026 • 6 min read • new

How to Install Claude Code on Ubuntu and Linux

Install Claude Code on Ubuntu, Debian, and other Linux distributions using the recommended native installer, official package-manager repositories, or npm.

Installing the Claude Code AI coding assistant in a Linux terminal on Ubuntu

Jul 6, 2026 • 5 min read

How to Create a Directory in Linux: mkdir Command Examples

Create single, multiple, and nested directories in Linux with mkdir, set permissions with -m, and fix 'Permission denied' and 'No such file or directory' errors.

Creating directories in Linux with the mkdir command

Jul 5, 2026 • 9 min read • new

ffmpeg Command in Linux: Convert, Compress, and Extract Media

Practical ffmpeg examples for converting between formats, compressing video with CRF, extracting audio, trimming clips, resizing video, and batch processing files on Linux.

Converting and compressing video files in a Linux terminal with the ffmpeg command

Jul 5, 2026 • 9 min read • series

Bash if...else Statement

A complete guide to Bash if, if...else, and if...elif...else statements with practical examples, test operators, and one-line syntax.

Jul 4, 2026 • 5 min read • new

Fix npm E401: Unable to Authenticate

Resolve the npm E401 'Unable to authenticate' error by fixing stale tokens, registry mismatches, and broken .npmrc auth settings for public and private registries.

Fixing the npm E401 unable to authenticate error

Jul 2, 2026 • 6 min read

du Command in Linux: Check Disk Usage

The du command reports disk space used by files and directories. This guide covers human-readable output, summary totals, depth limiting, sorting by size, and practical examples.

Jul 2, 2026 • 5 min read

head Command in Linux: Print the First N Lines of a File

The head command prints the first lines or bytes of a file. This guide shows how to display a specific number of lines, preview files, and limit command output in pipelines.

Using the head command in Linux to display the first lines of a file

Jul 2, 2026 • 8 min read • new

How to Install and Use Super Productivity on Linux

Install Super Productivity on Linux with Flatpak, Snap, AppImage, deb, rpm, Docker, or source, then create your first task and start tracking time.

Super Productivity task manager running on Linux

Jul 1, 2026 • 6 min read • series

Bash case Statement: Match Patterns in Shell Scripts

The Bash case statement matches a value against a list of patterns and runs the corresponding block. This guide explains argument parsing, syntax, glob patterns, multiple matches, and fall-through behavior.