It's quite easy.
  1. Install tob. Download the latest release, and follow the instructions in the README that tell you what to copy where.
  2. Try tob. Tob comes out-of-the-box with an example configuration that will back up your /etc directory to /var/backups. Try it: tob -full example . Now look in /var/backups:
    # ls /var/backups
    [..]
    example_2002_09_13_15_36_full.gz
    
  3. Verify your backup now: tob -verify example . Try editing /etc/profile, putting in an extra comment, and then re-running the verify. You should see something like:
    afio: "/etc/profile": Corrupt archive data
    
  4. Do an incremental backup. If you didn't already, edit /etc/profile and add an extra comment line. Type tob -inc example , then look in your backups directory:
    # ls /var/backups
    [...]
    example_2002_09_13_15_36_full.gz
    example_2002_09_13_15_42_inc.gz
    
  5. Try a restore.
    # cd /tmp
    # tob -restore example etc/passwd
    ..
    etc/passwd - uncompressed
    
    If you want everything restored, use tob -restore example '*'
  6. There's more. Tob does some great stuff. Check out the man page for details.