You should already know how to set-up and use a [http://imaging.mrc-cbu.cam.ac.uk/imaging/UsingVNC VNC viewer], and have some basic knowledge of [http://www.ee.surrey.ac.uk/Teaching/Unix/ Linux or Unix].
For example, you probably know commands such as ls, cd, pwd or mkdir which you usually execute in a command window:
attachment:FirstCommands.jpg
attachment:FirstScript.jpg