Debian (pronounced /ˈdɛbiən/) is a computer operating
system composed of software packages released as free and
open source software especially under the GNU General Public
License and other free software licenses. The primary form,
Debian GNU/Linux, which uses the Linux kernel and GNU OS
tools, is a popular and influential Linux distribution. It
is distributed with access to repositories containing
thousands of software packages ready for installation and
use. Debian is known for strict adherence to the Unix and
free software philosophies as well as using collaborative
software development and testing processes. Debian can be
used as a desktop as well as server operating system.