lightdm --version (return code: 0)
lightdm 1.18.3
lightdm --help (return code: 0)
Usage:
lightdm [OPTION...] - Display Manager
Help Options:
-h, --help Show help options
Application Options:
-c, --config=FILE Use configuration file
-d, --debug Print debugging messages
--test-mode Run as unprivileged user, skipping things that require root access
--pid-file=FILE File to write PID into
--log-dir=DIRECTORY Directory to write logs to
--run-dir=DIRECTORY Directory to store running state
--cache-dir=DIRECTORY Directory to cache information
--show-config Show combined configuration
-v, --version Show release version