Building an rsync Backup Server

You want users to back up their own data. But you really don't want to give users shell accounts all over the place, just so that they can do backups. You'd also like to make it easier for them to share files, again without giving all your users shell accounts.
Use a dedicated PC for a central server, and run rsync in daemon mode. Users will not need login accounts on the server, and you can use rsync's own access controls and user authorization for security.more...