http://fnords.wordpress.com/2009/03/05/etckeeper-chronicles-...
Edit: if you are worried about your crontab files from users then version /var/spool/cron/
http://fnords.wordpress.com/2009/03/05/etckeeper-chronicles-...
Edit: if you are worried about your crontab files from users then version /var/spool/cron/