$ virsh list
 Id    Name                           State
----------------------------------------------------
  81    instance-0000010d              running
 82    instance-0000010e              running
 84    instance-00000110              running
 85    instance-00000111              running

$ virsh vncdisplay 85
:9

$ ss -l |grep -v 127.0.0.1 |grep 590
LISTEN     0      1                       *:5907                     *:*
LISTEN     0      1                       *:5908                     *:*
LISTEN     0      1                       *:5909                     *:*

$ telnet 192.168.10.140 5909
Trying 192.168.10.140...
Connected to 192.168.10.140.
Escape character is '^]'.
RFB 003.008

$ ss |grep 5909
ESTAB      0      0          192.168.10.140:5909        192.168.10.117:52172

#!/bin/bash
yum install pixman pixman-devel libXfont tigervnc-server.x86_64 -y
cat <<EOF > /etc/sysconfig/vncservers
VNCSERVERS="6:root"
VNCSERVERARGS[6]="-geometry 1152x864"
EOF
chkconfig vncserver on
/usr/bin/vncpasswd
/etc/init.d/vncserver start