Linux is a free, UNIX-based open-source operating system developed by Linus Torvalds in 1991. Users can modify and create variations of source code called the distribution of computers and other devices. The most common use is as a server, but Linux is used on desktop computers, smartphones, e-book readers, game consoles, and more.

Linux distributions include the kernel (the bridge between central operating system components and software applications and their data), programs and tools for downloading, installing, and uninstalling system utilities and operating system updates.