unattended-upgrade -V (return code: 2)
Usage: unattended-upgrade [options]
unattended-upgrade: error: no such option: --version
unattended-upgrade --help (return code: 0)
Usage: unattended-upgrade [options]
Options:
-h, --help show this help message and exit
-d, --debug print debug messages
--apt-debug make apt/libapt print verbose debug messages
-v, --verbose print info messages
--dry-run Simulation, download but do not install
--minimal-upgrade-steps
Upgrade in minimal steps (and allow interrupting with
SIGINT