VirtualMachine
http://linux-tips.org/article/74/enabling-remote-desktop-on-a-virtualbox-machine
Enabling remote desktop on a VirtualBox Machine
To enable remote desktop on a VirtualBox machine, you have to follow these steps:
VBoxManage modifyvm YourMachineName -vrdp on
This command enables rdp on the virtual machine
VBoxManage startvm YourMachineName -type vrdp
It starts virtual machine... virtually! you won't see it on your server. The VM will listen for rdp request on port 3389 (default port) Connect from your linux client with:
rdesktop-vrdp localhost
That will connect your virtual machine with rdp (if you use rdesktop that is).
If you want to change the rdp port, use this command:
VBoxManage modifyvm MachineName -vrdpport <port>
(Don't forget to punch the necessary holes in your server's firewall)
Also, enabling authentication for rdp is possible:
VBoxManage modifyvm MachineName -vrdpauthtype null | external | guest
VBoxManage is the command line interface of the VirtualBox software from SUN.
You can make these settings with the GUI in your VirtualBox manager:
Settings -> Remote Display -> Enable VRDP Server
If you want to use your virtual machine with vrdp only, you can use this command simply:
VBoxHeadless -startvm MachineName
Note: RDP server is not included in Open Source Edition of the VirtualBox. If you want to use this feature, you have to use closed-source edition.