Debian

Debian, also known as Debian GNU/Linux, is a Linux distribution composed of free and open-source software, developed by the community-supported Debian Project, which was established by Ian Murdock on August 16, 1993. The first version of Debian was released on September 15, 1993, and its first stable version was released on June 17, 1996. It is one of the oldest operating systems based on the Linux kernel.

Many alternative Linux distributions are based on Debian, including Ubuntu, Linux Mint, Tails, and many others.