You can set up the ssh server in VL (sshd) and access it with the ssh client (ssh). If you want to try graphical, KDE has a built in remote desktop server and client, look for it on the menu. You might need to set up the server part in the KDE Control Panel, don't remember any more, used this a long time ago. I mostly use ssh now and you can set up sshd to allow user/password login, or by private/public keys. Just google for "linux sshd howto" (without the quotes) and you'll some good guides.
EDIT: forgot to add that you can have X session forwarding over ssh too.