linux 下经过xhost进入图形界面，常常会出现报错“unable to open display”

linux 下经过xhost进入图形界面，常常会出现报错“unable to  open display”

linux下的操做步骤以下：

[root@localhost ~]# vncserver

        New 'localhost:1 (root)' desktop is localhost:1

        Starting applications specified in /root/.vnc/xstartupLog file is /root/.vnc/localhost:1.log

[root@localhost ~]# export DISPLAY=localhost:1.0

注意这块变换后面为1.0   0.0等

[root@localhost ~]# xhost +

        access control disabled, clients can connect from any host