We've had a XenServer running since last year, and have been impressed so much that we introduced another one this year and both hosts have some eight Windows based servers sitting on them.

I've got a small Linux server running on an old workstation that hosts the Xibo Signage System and also looks after LimeSurveys as well running on Ubuntu. My plan was to move this to another VM on the newer host as it has more than enough capacity.

It would seem that only certain distros of Linux are supported on XenServer, primarily those being paid for enterprise flavours. CentOS is as well, but I've struggled with CentOS a bit recently setting up Asterisk and always like tinkering with Ubuntu. Needless to say I've had a bit of a mare getting something working on this host, but today I finally cracked it. I've got an optimized Ubuntu 10.04LTS 64Bit Virtual Machine up and running at last.

Found this article which helped me get Ubuntu installed over the internet on the Host. However, not much help if your behind a proxy as the Host can't get through to download the files, but after some digging found this which details how to add your proxy details to the host machine so it'll access the internet!

Hope it helps somebody else.

Pete