I run rsync in the cron every 4 hours. This works well for backups, but it generates six messages a day to root for each successful backup. I know I can put the output to /dev/null not to get any e-mail messages to root at all, but what I really want is exception reporting. In other words, only send an e-mail message to root if the rsync fails or has any problem completing normally. Is there a way to do this without having it also send e-mail to root every 4 hours? Thanks!