root@freenas2:~ # iocage clean --help
Usage: iocage clean [OPTIONS]
Destroy specified dataset types.
Options:
-f, --force Runs the command with no further user interaction.
-a, --all Destroy all iocage data that has been created.
-j, --jails Destroy all jails created.
-r, -b, --base Destroy all RELEASEs fetched.
-t, --template Destroy all templates.
--help Show this message and exit.
root@freenas2:~ #