Mine
public text v1 · immutablechuck@Linuxbox:~$ gksu shares-admin
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified
(gksu:22753): Gtk-WARNING **: cannot open display:
chuck@Linuxbox:~$ sudo xhost +
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified
xhost: unable to open display ":0.0"