by Howard Miller.
That's not strictly a question that can be answered. Moodle is compatible with the underlying server software, not the OS.
The sofware requirements are here: http://docs.moodle.org/24/en/Installing_Moodle#Software (for 2.4, the latest stable version)
If you have or can get these requirements for your OS then Moodle 2.4 is compatible.