Unixman posted a list of useful backup Utilities for Linux

Backup is absolutely necessary. If you think you don't need backup, wait till a calamity hits and you lose all your data. It might be utter redundancy, but we all just need it. There are several tools for easy backup, and I?ve listed some awesome backup tools for your Linux system. And some of these will also work on Mac and Windows as well.

  List of useful backup Utilities for Linux