Linux Guide

The Linux Guide is a 300-page technical e-book which stems from the notes I have been taking—first in a Moleskine notebook, then in digital form, and eventually polished and organized in a structured document—while studying, working, and teaching Linux. In the words of Jedi Master Yoda, "Pass on what you have learned".

The guide is structured as a bundle of Linux quick reference sheets. It describes more than 1200 Linux commands and contains useful information about standards and tools for Linux system administration, as well as a good amount of topics from the certification exams LPIC-1 (Linux Professional Institute Certification level 1), LPIC-2 (Linux Professional Institute Certification level 2), RHCSA (Red Hat Certified System Administrator), RHCE (Red Hat Certified Engineer), and CEH (Certified Ethical Hacker). This is an independent publication and is not affiliated with LPI, Red Hat, EC-Council, or any other organization.
You are free to share the Linux Guide, either partially or in its entirety, provided that you distribute it unmodified and not for profit.

You can download the guide from here (this is a permalink that always points to the latest edition). I release a new edition once a year, so if you happen to be a Linux geek, stay tuned.

Latest edition: 13th ed., January 2025

Previous editions:
1st ed., May 2013
2nd ed., September 2014
3rd ed., July 2015
4th ed., June 2016
5th ed., September 2017
6th ed., August 2018
7th ed., May 2019
8th ed., January 2020
9th ed., January 2021
10th ed., March 2022
11th ed., March 2023
12th ed., March 2024