Restart GNOME without restarting Xorg

gnomexorg

sometimes happens that some applications crash and make Gnome desktop unstable for example the upper bar vanishes. by restarting X ctrl+shift+backspace i can reset it. but is there a way just to re enable the bar or Gnome entirely?

Best Answer

You should be able to restart Gnome with 

 gnome-shell --replace

From the manual:

DESCRIPTION
   GNOME Shell provides core user interface functions for the GNOME 3 desktop,
   like switching to windows and launching  applications.  GNOME  Shell  takes
   advantage  of  the  capabilities of modern graphics hardware and introduces
   innovative user interface concepts to provide  a  visually  attractive  and
   easy to use experience.

OPTIONS
   --replace
          Replace the running window manager
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