Linux is a free and open-source software operating systems built around the Linux kernel. Typically, Linux is packaged in a form known as a Linux distribution for both desktop and server use. Linux kernel is the first operating system that has been released on September 17, 1991, by Linus Torvalds. Many Linux distributions use the common word called “Linux” in their name. Linux was originally developed for personal computers based on the Intel x86 architecture, but has since been ported to more platforms than any other operating system. Linux has the largest installed base of all general-purpose operating systems because of the dominance of the Linux kernel-based Android OS on smartphones. Linux is also the leading operating system on servers and other big iron systems such as mainframe computers, and the only OS used on TOP 500 supercomputers since November 2017, having before gradually eliminated all competitors. Linux distributions supports the dozens of programming languages.