xfwm4-tweaks-settings -V (return code: 1)
xfwm4: Cannot open display:
Try xfwm4 --help to see a full list of available command line options.
xfwm4-tweaks-settings --help (return code: 0)
Usage:
xfwm4-tweaks-settings [OPTION?] .
Help Options:
-h, --help Show help options
--help-all Show all help options
--help-gtk Show GTK+ Options
Application Options:
-s, --socket-id=SOCKET ID Session manager socket
-v, --version Version information
--display=DISPLAY X display to use