adt-virt-null -V (return code: 2)
usage: adt-virt-null [-h] [-d]
adt-virt-null: error: unrecognized arguments: --version
adt-virt-null --help (return code: 0)
usage: adt-virt-null [-h] [-d]
optional arguments:
-h, --help show this help message and exit
-d, --debug Enable debugging output