Learn Linux the way you actually use it — on the command line.

No-fluff tutorials and self-tests for people who run real servers. Work from “what is Linux?” all the way to web servers, security, and automation — every command tested on AlmaLinux 9 / RHEL 9.

Start from the beginning → Browse all topics

25hands-on tutorials
6learning stages
125self-test questions
RHEL 9tested commands

The learning path

From first login to production-ready

01 · FOUNDATIONS

Get your bearings

What Linux is, the major distributions, installing it, the filesystem layout, and the essential shell commands.

Begin → 02 · ADMINISTRATION

Run the system

Users and permissions, packages, processes, systemd services, storage and LVM, and reading logs.

Explore → 03 · NETWORKING

Connect it up

IP addressing and the ip suite, DNS, SSH with keys and tunnels, and firewalls with firewalld and ufw.

Explore → 04 · WEB SERVERS

Serve websites

Install and configure Nginx, Apache, and PHP; host multiple sites; and secure them with HTTPS via Let's Encrypt.

Explore → 05 · SECURITY

Lock it down

A practical hardening checklist, working with SELinux, and blocking brute-force attacks with fail2ban.

Explore → 06 · AUTOMATION

Make it repeatable

Bash scripting, scheduling with cron and systemd timers, and your first steps with Ansible.

Explore →