Linux is a free open source operating system originally developed by Linus Torvalds in the early 1990s. It was released as open source and remains a worldwide developed operating system mainly distributed via the Internet.

Linux is a popular operating system for developers, computer enthusiasts, Internet Service Providers, and corporations using it for various functions from workstations to network servers. It is most popular as a server, ranging from Web servers to mail servers to ftp servers.