以普通用户登录 su root 用vncviewer:xxxxx 会报错！！exit 回到最初环境变的用户 问题解决！！！！

 

 

[root@ok IT-DOC]# vncviewer :6001

TigerVNC Viewer for X version 1.1.0 - built May 11 2016 13:00:50
Copyright (C) 1999-2011 TigerVNC Team and many others (see README.txt)
See http://www.tigervnc.org for information on TigerVNC.
No protocol specified
vncviewer: unable to open display ":0.0"

[root@ok IT-DOC]# exit
exit
[ok@ok IT-DOC]$ vncviewer :6001

TigerVNC Viewer for X version 1.1.0 - built May 11 2016 13:00:50
Copyright (C) 1999-2011 TigerVNC Team and many others (see README.txt)
See http://www.tigervnc.org for information on TigerVNC.

Fri Sep 30 19:06:06 2016
 CConn:       connected to host localhost port 6001
 CConnection: Server supports RFB protocol version 3.8
 CConnection: Using RFB protocol version 3.8
 TXImage:     Using default colormap and visual, TrueColor, depth 24.
 CConn:       Using pixel format depth 24 (32bpp) little-endian rgb888
 CConn:       Using Tight encoding

问题解决