upgrade

The upgrade command targets a thick or thin jail. Thin jails will be updated by changing the release mount point that it is based on. Thick jails will be upgraded normally.

ishmael ~ # bastille upgrade help
Usage: bastille upgrade [option(s)] TARGET NEW_RELEASE
                                    TARGET install

    Options:

    -a | --auto      Auto mode. Start/stop jail(s) if required.
    -f | --force     Force upgrade a release (FreeBSD legacy releases).
    -x | --debug     Enable debug mode.