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.

.. code-block:: shell

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

      Options:

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