连linux系统安装oracle等，需要vnc软件。
1、下载VNC-5.2.1-Linux-x64-RPM.tar.gz
2、上传并解压，安装VNC-SERVER
3、启动vncserver。报错如下：
[root@test2 data]# vncserver
VNC(R) Server 5.2.1 (r5668) 64-bit (Aug 18 2014 12:26:41)
Copyright (C) 2002-2014 RealVNC Ltd.
VNC is a registered trademark of RealVNC Ltd in the U.S. and in other
countries.
Protected by UK patent 2481870; US patent 8760366.
See http://www.realvnc.com for information on VNC.
For third party acknowledgements see:
http://www.realvnc.com/products/vnc/documentation/5.2/acknowledgements.txt
Error: No license keys found.
表名没有license
上网找了个，输入如下：
vnclicense -add WHJRK-UXY7V-Q34M9-CZU8L-8KGFA
然后启动VNC
vncserver
电脑上双击vnc客户端。
连接192.168.153.80:1
输入用户名密码。进入系统