Our default 'pre installed' version of DirectAdmin always comes with CentOS 7.x as the underlying OS. When using your own license or using a 'DirectAdmin lifetime license' you can use this on the following operation systems our VPS-platform offers:
- CentOS: 6.x, 7.x, 8.x
- FreeBSD: 11.x, 12.x
- Debian: 8.x, 9.x, 10.x, 11.x alpha
- Ubuntu: 14.04, 16.04, 18.04, 20.04
More information about the system requirements and the most recent list of supported versions can be found at: Getting Started with DirectAdmin: What kind of server do I need?.