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
- FreeBSD: 9.x, 10.x, 11.x
- Debian: 6.0, 7.0, 8.0
- Ubuntu: Derived from Debian and is supported starting version 12.04
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?.