Linux systems are used in every domain, from embedded systems to supercomputers, and have secured a place in server installations often using the popular LAMP application stack. Use of Linux distributions in home and enterprise desktops has been growing. They have also gained popularity with various local and national governments.

 The Indian state of Kerala has gone to the extent of mandating that all state high schools run Linux on their computers.

The federal government of Brazil is well known for its support for Linux.

 News of the Russian military creating its own Linux distribution has also surfaced, and has come to fruition as the G.H.ost Project.

 China uses Linux exclusively as the operating system for its Loongson processor family to achieve technology independence.

 In Spain some regions have developed their own Linux distributions, which are widely used in education and official institutions,

France and Germany have also taken steps toward the adoption of Linux.

 Linux is a  computer operating system assembled under the model of free and open source software development and distribution.  Linux kernel was first released October 5, 1991 by Linus Torvalds.

 Linux was originally developed as a free operating system for Intel x86-based personal computers. It is a leading operating system on servers and other big iron systems such as mainframe computers and supercomputers: more than 90% of today's top 500 supercomputers run some variant of Linux, including the 10 fastest. Linux also runs on embedded systems (devices where the operating system is typically built into the firmware and highly tailored to the system) such as mobile phones, tablet computers, network routers, televisions and video game consoles; the Android system in wide use on mobile devices is built on the Linux kernel.

Linux distributions have long been used as server operating systems, and have risen to prominence in that area; Netcraft reported in September 2006 that eight of the ten most reliable internet hosting companies ran Linux distributions on their web servers. Since June 2008, Linux distributions represented five of the top ten, FreeBSD three of ten, and Microsoft two of ten; since February 2010, Linux distributions represented six of the top ten, FreeBSD two of ten, and Microsoft one of ten.