A Fundamental Overview of GNU/Linux

Note: Most of this information is taken from the 2015 RHCSA & RCHE Red Hate Enterprise Linux Training & Exam Preparation Guide. Some of this information may be outdated or in need of minor updates.

Linux, also known as GNU/Linux, is a free and open source operating system similar to the UNIX operating system in terms of concepts, features and functionality. It is one of many operating systems in the “UNIX-like” family, which includes the BSD family, and the *nix family:

In 1984 (an auspicious year)