I can access two different shutdown menus.
One is the default one :
The other is the one triggered by the command
gnome-session-quit --power-off :
When looking for a command that I could use with a shortcut to shut down the system, this is the one I could find.
I'm curious what is the command for the default menu :)
shutdown -h nowcannot be used without
dbus-sendcommand, but we can't seem to find a reference in it.