“rsnapshot, as mentioned earlier, is an incremental backup
utility. In this tutorial, I will show you how to create a seven
day rotation backup scheme using rsnapshot. Essentially, rsnapshot
will create 1 full backup and then subsequent backups will backup
only files that have changed. The true power of rsnapshot is its
ability to utilize hard-links between each backup. Each backup will
appear to be a full backup. In reality each new backup consists of
newly created or updated files. rsnapshot can be used over a LAN
and can also be ran from cron.