Using Ubuntu - Part 2： The Preinstalled Applications

Using Ubuntu - Part 3： Customization and Tweaking

NAT Configuration - Packet Tracer 5.3 - Part-1.

Using Ubuntu - Part 1： Intro, Interface, and Codecs.

Linux Tutorial for Beginners ｜ Lesson 1 [HD

Telnet client serveur Coté Serveur

Linux Tutorial for Beginners ｜ Lesson 2 [HD].