Debian is the open source and free Linux based operating system. Developed by The Debian Project
License: Open Source
Ubuntu Server brings economic and technical scalability to your datacentre, public or private. Whether you want to deploy an OpenStack cloud, a Hadoop cluster or a 50,000-node render farm, Ubuntu Server delivers the best value scale-out performance available. Developed by Canonical Ltd
License: Open Source
Debian is known for its stability and adherence to free software principles, making it ideal for experienced users and server environments. Ubuntu Server, built on Debian, offers a more user-friendly approach with regular updates and commercial support, catering to both beginners and developers.