Seems loads of GeoGeeks have been dabbling with Ubuntu and the idea of installing their own virtual box. Here’s a handy how to video from Riccardo Klinger
that can give you a little help with getting started. For more of his handy videos check out his channel at http://www.youtube.com/ricckli
FYI, for those of you new to Ubuntu here’s a pointer to a handy free guide that may come in handy to get you started.