Some notes about MySQL and PostgreSQL. Ceph's Storage clustering and KVM virtualization. Programming with NodeJS and PHP. Hacking with RaspberryPI and Arduino.
Ubuntu is a Debian-based Linux operating system, with Unity as its default desktop environment. It is based on free software and named after the Southern African philosophy of ubuntu (literally, "human-ness"), which often is translated as "humanity towards others" or "the belief in a universal bond of sharing that connects all humanity".
Ubuntu's goal is to be secure "out-of-the box". By default user's programs run with low privileges and cannot corrupt the operating system or other user's files.