在centOS上安装VNC

步骤如下：

1.搜寻VNC Server

[root@msg45 wasliberty]# yum search tigervnc-server
Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
 * base: mirrors.advancedhosters.com
 * extras: mirrors.advancedhosters.com
 * updates: mirrors.advancedhosters.com
================================= N/S Matched: tigervnc-server =================================
tigervnc-server.x86_64 : A TigerVNC server
tigervnc-server-applet.noarch : Java TigerVNC viewer applet for TigerVNC server
tigervnc-server-module.x86_64 : TigerVNC module to Xorg

  Name and summary matches only, use "search all" for everything.

2.安装VNC Server
[root@msg45 wasliberty]# yum install tigervnc-server.x86_64
Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
 * base: mirrors.advancedhosters.com
 * extras: mirrors.advancedhosters.com
 * updates: mirrors.advancedhosters.com
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package tigervnc-server.x86_64 0:1.1.0-5.el6_4.1 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================================
 Package                    Arch              Version                     Repository       Size
================================================================================================
Installing:
 tigervnc-server            x86_64            1.1.0-5.el6_4.1             base            1.1 M

Transaction Summary
================================================================================================
Install       1 Package(s)

Total download size: 1.1 M
Installed size: 2.9 M
Is this ok [y/N]: y
Downloading Packages:
tigervnc-server-1.1.0-5.el6_4.1.x86_64.rpm                               | 1.1 MB     00:00     
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing : tigervnc-server-1.1.0-5.el6_4.1.x86_64                                       1/1
  Verifying  : tigervnc-server-1.1.0-5.el6_4.1.x86_64                                       1/1

Installed:
  tigervnc-server.x86_64 0:1.1.0-5.el6_4.1                                                      

Complete!
[root@msg45 wasliberty]#

3.设置VNC Server密码

注：用#service vncserver start/restart后提示root密码没设时用此命令重设密码。2014年10月16日

[root@msg45 wasliberty]# vncserver

You will require a password to access your desktops.

Password:
Verify:
xauth:  creating new authority file /root/.Xauthority

New 'asg45.watson.ibm.com:1 (root)' desktop is asg45.watson.ibm.com:1

Creating default startup script /root/.vnc/xstartup
Starting applications specified in /root/.vnc/xstartup
Log file is /root/.vnc/asg45.watson.ibm.com:1.log

[root@msg45 wasliberty]#

4.修改文件/root/.vnc/xstartup，增加最后一行，注释掉倒数第二行。
[root@msg45 wasliberty]# vi /root/.vnc/xstartup

#!/bin/sh

[ -r /etc/sysconfig/i18n ] && . /etc/sysconfig/i18n
export LANG
export SYSFONT
vncconfig -iconic &
unset SESSION_MANAGER
unset DBUS_SESSION_BUS_ADDRESS
OS=`uname -s`
if [ $OS = 'Linux' ]; then
  case "$WINDOWMANAGER" in
    *gnome*)
      if [ -e /etc/SuSE-release ]; then
        PATH=$PATH:/opt/gnome/bin
        export PATH
      fi
      ;;
  esac
fi
if [ -x /etc/X11/xinit/xinitrc ]; then
  exec /etc/X11/xinit/xinitrc
fi
if [ -f /etc/X11/xinit/xinitrc ]; then
  exec sh /etc/X11/xinit/xinitrc
fi
[ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources
xsetroot -solid grey
xterm -geometry 80x24+10+10 -ls -title "$VNCDESKTOP Desktop" &
#twm &
gnome-session &
~
~

5.修改显示设置，增加最后两行。
[root@msg45 wasliberty]# 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 this URL:
# http://kbase.redhat.com/faq/docs/DOC-7028

# Use "-nolisten tcp" to prevent X connections to your VNC server via TCP.

# 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 -localhost"

VNCSERVERS="1:root"
VNCSERVERARGS[1]="-geometry 1024x768"
~
~
~
~
6.修改/etc/sysconfig/iptables，放开5901端口。
[root@msg45 wasliberty]# vi /etc/sysconfig/iptables

-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
# Firewall configuration written by system-config-firewall
# Manual customization of this file is not recommended.
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 5901  -j ACCEPT
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT
~
~
"/etc/sysconfig/iptables" 13L, 490C written

7.重启iptables
[root@msg45 wasliberty]# service iptables restart
iptables: Setting chains to policy ACCEPT: filter [  OK  ]
iptables: Flushing firewall rules: [  OK  ]
iptables: Unloading modules: [  OK  ]
iptables: Applying firewall rules: [  OK  ]
[root@msg45 wasliberty]#

8.以下就是关闭和打开VNCServer了。

[root@msg45 wasliberty]# /etc/init.d/vncserver stop
Shutting down VNC server: 1:root [  OK  ]
[root@msg45 wasliberty]# /etc/init.d/vncserver start
Starting VNC server: 1:root
New 'asg45.watson.ibm.com:1 (root)' desktop is asg45.watson.ibm.com:1

Starting applications specified in /root/.vnc/xstartup
Log file is /root/.vnc/asg45.watson.ibm.com:1.log

[  OK  ]

之后，就能通过RealVNC工具看了。

上文参考了：http://www.blogjava.net/icewee/archive/2013/02/22/395594.html ，作者写得很好，如有不明，建议前往围观。