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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Mar 26, 2026 • 2 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.

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.

Create Users in Linux Using the useradd Command

Mar 10, 2026 • 10 min read

How to Create Users in Linux (useradd Command)

Learn how to create and add users in Linux with the useradd command, including home directories, passwords, groups, shells, UIDs, and other common account options.

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Jun 15, 2026 • 10 min read

Python Tuples: Create, Access, Slice, and Unpack

Work with Python tuples: how to create, access, slice, unpack, and loop over them, plus how tuples differ from lists and when to use each.

Jun 15, 2026 • 5 min read

How to Undo Last Git Commit

Undo the last Git commit with git reset or git revert, and pick the right option to keep your changes, discard them, or safely undo a pushed commit.

Jun 15, 2026 • 5 min read • new

hostnamectl Command in Linux: Set and Query Hostname

Use hostnamectl to view and change the Linux hostname. Covers static, transient, and pretty names, system metadata, remote hosts, and common errors.

hostnamectl changing a Linux system name from old-host to web-server-01

Jun 14, 2026 • 6 min read

How to Setup a Git Server

Run your own private Git server over SSH on Linux. This guide covers installing Git, creating the git user, adding SSH keys, and pushing your first repository.

Jun 14, 2026 • 4 min read

How to Change Root Password in Ubuntu Linux

Set or change the root password on Ubuntu using sudo passwd, switch to the root account, and understand why root login is disabled by default.

Jun 14, 2026 • 6 min read • new

host Command in Linux: DNS Lookup

The host command is a simple DNS lookup tool. This guide covers forward and reverse lookups, querying specific record types, using a chosen name server, and reading the output.

Running DNS lookups with the host command in a Linux terminal

Jun 13, 2026 • 8 min read

IPv4 vs IPv6: Differences Explained

IPv4 and IPv6 are the two versions of the Internet Protocol. This guide explains how they differ in addressing, header format, and features, with a side-by-side comparison.

Jun 13, 2026 • 4 min read

pidof Command in Linux: Find Process IDs by Name

The pidof command finds the process ID (PID) of a running program by name. This guide explains how to use pidof, its options, and how to pair it with kill to manage processes.

Jun 11, 2026 • 8 min read • new • series

Linux Pipes Explained: How to Use the | Operator

Linux pipes connect command output to another command's input. Learn the | operator, pipefail, stderr piping, xargs, named pipes, and process substitution.