juju

juju help plugins
ERROR 'juju-backup --description': exit status 1
Juju Plugins

Plugins are implemented as stand-alone executable files somewhere in the user's PATH.
The executable command must be of the format juju-<plugin name>.

backup    error occurred running 'juju-backup --description'
metadata  tools for generating and validating image and tools metadata
restore   Restore a backup made with juju backup