Brief history
Linux, computer operating system created in the early 1990s by Finnish software engineer Linus Torvalds and the Free Software Foundation (FSF). While still a student at the University of Helsinki, Torvalds started developing Linux to create a system similar to MINIX, a UNIX operating system.
Using almost exclusively the C programming language, Linus developed the Linux kernel using the foundation laid by Richard Stallman’s work on the GNU project.
Linux Distros
Dozens of Linux distributions have been released, driven mainly by hobbyist developers. Today, Ubuntu is the most popular distribution of Linux, with over 25 million users worldwide.
Some popular distro's are:
Ubuntu, Debian, Red Hat, Linux Mint, Arch Linux, CentOS, Fedora, Linux Lite and OpenSUSE.Linux File System
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Unix operating systems
Click on the image below for all the different operating systems based on Unix: