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Ubuntu Server Edition is now certified by Canonical for use on HP ProLiant servers, including the latest HP ProLiant G6 servers. Canonical Labs performs a series of rigorous tests leading up to certification, giving customers the confidence that Ubuntu Server Edition runs well on HP ProLiant servers.
Get Ubuntu : You can download Ubuntu for free from Canonical, order a CD from a reseller, or request a CD from Canonical. It's free!
Get HP ProLiant Support Pack for Ubuntu (click on Downloads) : HP provides management agents and drivers to simplify the operation and management of Ubuntu Server Edition on HP ProLiant servers. And yes, it's free!
Get Support : Canonical provides professional software support services for Ubuntu Server Edition. Also, HP hosts a
Linux Forum where you can give and receive help, tips, and opinions. Come join the party. Need we mention it's free?