An rsync based incremental backup script.
./src/backup.sh SOURCE DESTINATION JOBNAMETo copy the entire /Users directory to an external disk labelled "Backup"
(/Volumes/Backup), using a job name users.
./src/backup.sh /Users /Volumes/Backup usersls /Volumes/Backup
# users
# users.1
# users.2
# users.3