Configure the server to use Samba (or NFS), then connect from the workstations to the server.
In Ubuntu, this is done using:
Menu Places
Connect to server
Enter "Windows share" (which is SMB/CIFS/Samba protocol)
Enter IP address, username and click Connect
Enter password
You should now be able to access it; create a bookmark for subsequent accesses
------------------------------...man will occasionally stumble over the truth, but usually manages to pick himself up, walk over or around it, and carry on.
Reply to sub mesa
NFS has the advantage that you can mount remote file systems under your existing directory structure. For example \home\music\ would really be \home\drive_on_remote_server\ so you could run local tools as if the files were local.