do-release-upgrade --version (return code: 0)
do-release-upgrade: version 16.04.20
do-release-upgrade --help (return code: 0)
Usage: do-release-upgrade [options]
Options:
-h, --help show this help message and exit
-V, --version Show version and exit
-d, --devel-release Check if upgrading to the latest devel release is
possible
--data-dir=DATA_DIR Directory that contains the data files
-p, --proposed Try upgrading to the latest release using the upgrader
from $distro-proposed
-m MODE, --mode=MODE Run in a special upgrade mode. Currently 'desktop' for
regular upgrades of a desktop system and 'server' for
server systems are supported.
-f FRONTEND, --frontend=FRONTEND
Run the specified frontend
-s, --sandbox Test upgrade with a sandbox aufs overlay
-c, --check-dist-upgrade-only
Check only if a new distribution release is available
and report the result via the exit code
-q, --quiet