I need to learn to set up an extremely limited user on my Unix Web server. I host clients' Web sites and until now, I have told all my clients that they can't access the server directly. Most clients don't want this. They want me to do the technical and design work. I have now had several requests for accounts that allow the users to have FTP and Telnet access. How can I protect the rest of my server and yet allow these clients to access a specific directory on my server with FTP and Telnet? I have a number of proprietary software programs and a database server running on this machine, so I REALLY DON'T want these people endangering the stability of the machine or any files except their own.