Practical Linux Tutorials and Command-Line Guides

Search hundreds of step-by-step tutorials for Bash, Ubuntu, networking, security, and more.

Featured Articles

Apr 22, 2026 • 6 min read

Ping Command in Linux

The ping command tests network connectivity by sending ICMP packets to a host and reporting latency, TTL, and packet loss.

Apr 24, 2026 • 5 min read

gzip Command in Linux

Step-by-step examples for compressing and decompressing files with the gzip command in Linux, covering the most useful options.

Jun 29, 2026 • 7 min read

How to Use Nano, the Linux Command Line Text Editor

Learn the essential nano commands and keyboard shortcuts: open, save, and exit files, search and replace text, copy and paste, and use sudo nano to edit system files.

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

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Oct 11, 2026 • 11 min read • series

Bash Strict Mode: set -euo pipefail Explained

A practical guide to Bash strict mode: how set -e, set -u, set -o pipefail, and IFS change script behavior, why they catch silent failures, and when to turn them off.

Enabling Bash strict mode with set -euo pipefail at the top of a shell script

Oct 10, 2026 • 11 min read • new • series

How to Use an SSH Jump Host with ProxyJump

Connect to private servers through an SSH jump host with ssh -J and ProxyJump. Configure keys, copy files, forward ports, and restrict the bastion account.

Laptop connected through an SSH jump host to two private servers

Oct 10, 2026 • 7 min read

exFAT on Linux: Mount and Use exFAT Drives on Ubuntu

Linux reads and writes exFAT through a built-in kernel driver. Mount exFAT USB drives and SD cards on Ubuntu, add an fstab entry, format with exfatprogs, and fix 'unknown filesystem type' errors.

Oct 10, 2026 • 12 min read • series

Bash if, elif, and else Statements: Syntax and Examples

Write Bash conditionals with if, if else, and elif blocks. Covers test operators, file checks, commands as conditions, && and || chains, and one-line if syntax.

Oct 9, 2026 • 8 min read

chattr Command in Linux: Change File Attributes

The chattr command changes file attributes in Linux. Make a file immutable with chattr +i, keep logs append-only with +a, and check flags with lsattr.

Oct 9, 2026 • 7 min read

tr Command in Linux: Translate, Delete, and Squeeze Characters

The tr command translates, deletes, and squeezes characters from standard input. This guide covers tr syntax, character sets and ranges, case conversion, removing line endings, and practical pipeline examples.

Using the Linux tr command to translate and delete characters

Oct 8, 2026 • 10 min read

Rsync Command in Linux with Examples

Use rsync to sync files and directories locally or over SSH. Covers common options, dry runs, exclusions, mirroring, and troubleshooting.

Using the rsync command to sync files and directories in Linux

Oct 8, 2026 • 13 min read

How to Build Docker Images with Dockerfile

Write a Dockerfile, build an image with docker build, and run it as a container. Includes an Ubuntu 26.04 example, the -f option, .dockerignore, and multi-stage builds.

Dockerfile example used to build a Docker image on Ubuntu

Oct 8, 2026 • 7 min read

How to Flush DNS Cache on Linux, Windows, macOS, and Chrome

Commands to flush the DNS cache on Linux (systemd-resolved, dnsmasq, nscd), Windows, and macOS, plus how to clear the Chrome and Firefox DNS cache.

Flushing the DNS cache on Linux, Windows, and macOS

Oct 8, 2026 • 11 min read

find Command in Linux: Search Files and Directories

The find command searches for files and directories by name, type, size, date, permissions, and more. This guide covers practical examples including wildcards, exec actions, and combining find with grep.