Amazon Lightsail - Debian GNU/Linux 9 (Stretch)
Debian GNU/Linux 9 (Stretch). Debian is a computer operating system composed of software packages released as free and open source software primarily under the GNU General Public License along with other free software licenses. Debian GNU/Linux, which includes the GNU OS tools and Linux kernel, is a popular and influential Linux distribution. It is distributed with access to repositories containing thousands of software packages ready for installation and use.