eog --version (return code: 0)
GNOME Image Viewer 3.18.2
eog --help (return code: 0)
Usage:
eog [OPTION...] [FILE…]
Help Options:
-h, --help Show help options
--help-all Show all help options
--help-gtk Show GTK+ Options
Application Options:
-f, --fullscreen Open in fullscreen mode
-g, --disable-gallery Disable image gallery
-s, --slide-show Open in slideshow mode
-n, --new-instance Start a new instance instead of reusing an existing one
-w, --single-window Open in a single window, if multiple windows are open the first one is used
--version Show the application's version
--display=DISPLAY X display to use