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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GNU Screen terminal multiplexer managing multiple sessions in Linux

Apr 30, 2026 • 7 min read

How to Use Linux Screen

GNU Screen is a terminal multiplexer for managing persistent sessions over SSH. This guide covers sessions, windows, detach/reattach, scrollback mode, and customization.

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.

Bash case statement syntax and pattern matching examples

Jul 1, 2026 • 6 min read

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.

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Sep 16, 2026 • 12 min read

ripgrep Command in Linux: Fast Recursive Search

The ripgrep command searches directories recursively while respecting ignore files. This guide explains rg syntax, file type filters, context lines, replacement previews, and config defaults.

ripgrep command searching files recursively in a Linux terminal

Sep 16, 2026 • 8 min read • series

Bash while Loop: Syntax and Examples

Bash while loop syntax and examples: infinite loops, reading files line by line, arithmetic conditions, and the break and continue statements.

Sep 16, 2026 • 11 min read

How to Format USB Drives and SD Cards on Linux

Step-by-step instructions for formatting USB drives and SD cards on Linux using parted and mkfs. Covers FAT32, exFAT, EXT4, and NTFS filesystems with partition table setup and verification.

Sep 14, 2026 • 10 min read • new

Fix "No Space Left on Device" When df Shows Free Space

Fix Linux no-space errors when df shows free space by checking the target mount, inode usage, tmpfs limits, container storage, Btrfs, and inotify watches.

Linux disk block usage and exhausted inode diagnostic cards

Sep 14, 2026 • 9 min read • series

How to Add a User to a Group in Linux

Add users to Linux groups with usermod, verify group membership, change primary groups, and fix common issues when group changes do not apply.

Sep 14, 2026 • 5 min read

pwd Command in Linux: Print the Current Working Directory

The pwd command prints the current working directory in Linux. This guide covers pwd syntax, the -L and -P options, $PWD and $(pwd) in scripts, and how symlinks affect the output.

Using the pwd command to print the current working directory in Linux

Sep 13, 2026 • 6 min read

How to Search in Vim / Vi

Learn how to search in Vim / Vi with forward and backward search, whole-word matching, case sensitivity, search highlighting, and smartcase examples.

Sep 13, 2026 • 12 min read • series

Understanding the /etc/fstab File in Linux

The /etc/fstab file defines how filesystems and storage devices are mounted at boot. This guide explains the fstab format, field meanings, mount options, and how to add new entries safely.

The /etc/fstab file shown as a Linux storage configuration map

Sep 11, 2026 • 13 min read • series

How to Create Users in Linux (useradd Command)

Create user accounts in Linux with useradd: home directories, passwords, groups, shells, UIDs, and expiry dates, plus how useradd compares to adduser.