1. Ubuntu is a Debian Linux-based open source operating system for desktop computers.

  2. Debian is a free distribution of the GNU/Linux operating system.

  3. CentOS is a community-supported, free and open source operating system based on Red Hat Enterprise...

  4. CoreOS platform provides the components needed to build distributed systems to support application containers.

  5. Fedora gives 10,000+ course creators everything they need to build engaging and profitable online courses. Try us out, we're free to use!

  6. Linux Mint is one of the most popular desktop Linux distributions and used by millions of people.

  7. openSUSE is a free and Linux-based operating system for your PC, Laptop or Server.