isnapshot - Incremental Backup Program
isnapshot performs incremental backups by copying changed files and symlinking unchanged files to a previous full backup. The result is an always available incremental backup with minimal wasted space.
It's meant to be run as a cron job or manually to create quick snapshots of working directories or to do full system backups.Simply,
./configure make su && make installThen, add a cron job possibly like the following,
02 4 * * * root /usr/local/bin/isnapshot /home /var/www /etc /snapshot_dir