1. 安装命令
[root@bonnie]# yum -y install vnc vnc-server
2. 配置文件说明
[root@bonnie]# vi /etc/sysconfig/vncservers
———————————————————————————————————————————
# The VNCSERVERS variable is a list of display:user pairs.
#
# Uncomment the lines below to start a VNC server on display :2
# as my 'myusername' (adjust this to your own). You will also
# need to set a VNC password; run 'man vncpasswd' to see how
# to do that.
#
# DO NOT RUN THIS SERVICE if your local area network is
# untrusted! For a secure way of using VNC, see
# <URL:http://www.uk.research.att.com/archive/vnc/sshvnc.html>.
# Use "-nolisten tcp" to prevent X connections to your VNC server via TCP.
# Use "-nohttpd" to prevent web-based VNC clients connecting.
# Use "-localhost" to prevent remote VNC clients connecting except when
# doing so through a secure tunnel. See the "-via" option in the
# `man vncviewer' manual page.
# VNCSERVERS="2:myusername"
# VNCSERVERARGS[2]="-geometry 800x600 -nolisten tcp -nohttpd -localhost”
———————————————————————————————————————————
将最后两行配置信息取消注释，添加系统账号
VNCSERVERS="1:root 2：etl"
VNCSERVERARGS[1]="-geometry 1024x768 -nolisten tcp -nohttpd "
VNCSERVERARGS[2]="-geometry 1024x768 -nolisten tcp -nohttpd "
VNCSERVERS 是用来设定可以使用VNC的服务器账号，可以设定多个，例如上面root、etl，但是中间要用空格隔开。使用VNCVIEWER登录时，192.168.48.128:1表示是以root账号登录，以此类推。
关于参数配置说明：
1：-geometry 表示桌面分辨率，默认为1024x768，所以上面的1024x768也可以不写。
2：-nohttpd 表示不监听HTTP端口（58xx）。
3：-nolisten tcp 表示不监听TCP端口（60xx）
4：-localhost 只运行从本机访问。
5：AlwaysShared 默认只允许一个VNCVIEWER连接，此参数表示同一个显示端口允许多用户同时登录.
6：-depth 表示色深，参数有8,16,24,32.
7: SecurityTypes None 登录不需要密码认证VncAuth默认值,要密码认证。
3. 设置VNC用户密码
如果此时不设置VNC用户密码，启动vncserver服务，则会报如下错误：
[root@bonnie ~]# service vncserver start
Starting VNC server: 1:root [FAILED]
[root@bonnie /]# vncpasswd
Password:
Verify:
[root@bonnie /]# su - etl
[etl@bonnie ~]$ vncpasswd
Password:
Verify:
[etl@bonnie ~]$
4. 启动vncserver服务
[root@bonnie ~]# service vncserver start
Starting VNC server: 1:root
New 'localhost.localdomain:1 (root)' desktop is localhost.localdomain:1
Creating default startup script /root/.vnc/xstartup
Starting applications specified in /root/.vnc/xstartup
Log file is /root/.vnc/localhost.localdomain:1.log
2:etl
New 'localhost.localdomain:2 (etl)' desktop is localhost.localdomain:2
Creating default startup script /home/etl/.vnc/xstartup
Starting applications specified in /home/etl/.vnc/xstartup
Log file is /home/etl/.vnc/localhost.localdomain:2.log
[ OK ]
VNC会在用户根目录($HOME)下的”.vnc"文件夹下生成一系列文件。其中passwd为vnc用户密码文件，由vncpasswd生成。其他的都由vnc初次启动时生成，xstartup为VNC客户端连接时启动的脚本
5. 配置xstartup文件
如下所示，将下面紫红色的部分注释取消。
#!/bin/sh
# Uncomment the following two lines for normal desktop:
unset SESSION_MANAGER
exec /etc/X11/xinit/xinitrc
[ -x /etc/vnc/xstartup ] && exec /etc/vnc/xstartup
[ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources
xsetroot -solid grey
vncconfig -iconic &
xterm -geometry 80x24+10+10 -ls -title "$VNCDESKTOP Desktop" &
twm &
切换到etl账号，依法炮制
[root@bonnie ~]# su - etl
[etl@bonnie ~]$ vi /home/etl/.vnc/xstartup
[root@bonnie ~]# service vncserver restart
Shutting down VNC server: 1:root 2:etl [ OK ]
Starting VNC server: 1:root
New 'localhost.localdomain:1 (root)' desktop is localhost.localdomain:1
Starting applications specified in /root/.vnc/xstartup
Log file is /root/.vnc/localhost.localdomain:1.log
2:etl
New 'localhost.localdomain:2 (etl)' desktop is localhost.localdomain:2
Starting applications specified in /home/etl/.vnc/xstartup
Log file is /home/etl/.vnc/localhost.localdomain:2.log
[ OK ]
chkconfig vncserver on