Slackware is a Linux distribution originally based on Softlanding Linux System. Developed by Patrick Volkerding
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
Slackware is known for its stability and minimalism, appealing to users who prefer a hands-on approach and customization. In contrast, Ubuntu Server offers a more user-friendly experience with robust community support and regular updates, making it suitable for users seeking ease of use and extensive software availability.