gnome-system-log --version (return code: 0)
GNOME System Log 3.9.90
gnome-system-log --help (return code: 0)
Usage:
gnome-system-log [OPTION...] [URI...] A system log viewer for GNOME.
Help Options:
-h, --help Show help options
--help-all Show all help options
--help-gtk Show GTK+ Options
Application Options:
--version Show the version of the program.
--display=DISPLAY X display to use