tux This course is an introduction to the basics of Linux and is meant for beginners. Lots of people still think that understanding Linux is difficult, or that
only experts can The goal of
this guide is to show people of all ages that Linux can be simple, fun
and used for all kinds of purposes.

Gentoo is a free operating system based on either Linux or FreeBSD that can be automatically optimized and customized for just about any application or need. Thanks to a technology called Portage, Gentoo can become an ideal secure server, development workstation, professional desktop, gaming system, embedded solution or something else -- whatever you need it to be.

This course teaches the fundamentals of networking, what the TCP/IP protocol stack consists of and how the different layers of the network stack influence communication on a network. You will learn how Linux can be used as a router and the basic principles of digital encryption and digital signatures used to keep email secure. As well as how to set up secure connections between different Linux machines by using SSH.

The guide is
structured as a project that builds a small diskette-based GNU/Linux
system called Pocket Linux.
Linux guide for system administrators.
This is a handbook for professors and teachers who would like to teach their students about open source software.
Controlling your computer with the terminal
ubuntu desktop guide
Desktop Users Guide for Ubuntu.