What kind of access to this file server do you want? There are a number of remote admin tools, but if it's direct access that you want, the most popular app is VNC. Most likely, depending on the distro and it's version, it's already installed - although maybe not enabled. Try opening up a VNC viewer (like tightVNC -
http://www.tightvnc.com/) and connecting to: <serverip>:1 (ex: 192.169.1.100:1) - you'll be presented with the desktop logon!
This is a convient remote admin method, but nowhere nearly as fast as SSH, and very little to any security.
Plz let us know if this isn't what you're looking for...