svr-2# setenv DISPLAY :0 ; vncviewer

VNC Viewer Free Edition 4.1.2 for X - built Oct 17 2006 04:38:01
Copyright (C) 2002-2005 RealVNC Ltd.
See http://www.realvnc.com for information on VNC.
Xlib: connection to ":0.0" refused by server
Xlib: Invalid MIT-MAGIC-COOKIE-1 key
vncviewer: unable to open display ":0"