(Independently of the topic)
Whatever you are trying to do on a computer, there's certainly a Free and Open Source Software that can do it! In this section you will find tutorials to learn how to use them! If you want a tutorial for a particular software (only FOSS please), just ask!
GNU/Linux is a free operating system that can replace your Windows or MacOS. It is also the system that powers maybe 70% of the Internet! These tutorials range from the absolute beginner to the command line expert.
(14.04 LTS, 12.04 LTS)
(Command line interface)
(Web development CMS/framework)
In this section we will put tutorials about open-source hardware like Arduino, RaspberryPI, Paralella and other stuff related to microcontrollers, embedded systems and automation