Howtoforge posted a guide about virtualization with VirtualBox 3.1.x on a headless Fedora 12 Server
This guide explains how you can run virtual machines with Sun VirtualBox 3.1.x on a headless Fedora 12 server. Normally you use the VirtualBox GUI to manage your virtual machines, but a server does not have a desktop environment. Fortunately, VirtualBox comes with a tool called VBoxHeadless that allows you to connect to the virtual machines over a remote desktop connection, so there's no need for the VirtualBox GUI.Virtualization With VirtualBox 3.1.x On A Headless Fedora 12 Server
