[root@dba ~]# yum -y install gtk-vnc*
Loaded plugins: refresh-packagekit, security
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package gtk-vnc.x86_64 0:0.3.10-3.el6 will be installed
---> Package gtk-vnc-python.x86_64 0:0.3.10-3.el6 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

======================================================================================================================================
 Package                            Arch                       Version                          Repository                       Size
======================================================================================================================================
Installing:
 gtk-vnc                            x86_64                     0.3.10-3.el6                     rhel-Server                      95 k
 gtk-vnc-python                     x86_64                     0.3.10-3.el6                     rhel-Server                      17 k

Transaction Summary
======================================================================================================================================
Install       2 Package(s)

Total download size: 111 k
Installed size: 284 k
Downloading Packages:
--------------------------------------------------------------------------------------------------------------------------------------
Total                                                                                                 2.4 MB/s | 111 kB     00:00    
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing : gtk-vnc-0.3.10-3.el6.x86_64                                                                                        1/2
  Installing : gtk-vnc-python-0.3.10-3.el6.x86_64                                                                                 2/2
  Verifying  : gtk-vnc-python-0.3.10-3.el6.x86_64                                                                                 1/2
  Verifying  : gtk-vnc-0.3.10-3.el6.x86_64                                                                                        2/2

Installed:
  gtk-vnc.x86_64 0:0.3.10-3.el6                                  gtk-vnc-python.x86_64 0:0.3.10-3.el6                                

Complete!

[root@dba ~]# yum -y install gtk-vnc*
Loaded plugins: refresh-packagekit, security
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package gtk-vnc.x86_64 0:0.3.10-3.el6 will be installed
---> Package gtk-vnc-python.x86_64 0:0.3.10-3.el6 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

======================================================================================================================================
 Package                            Arch                       Version                          Repository                       Size
======================================================================================================================================
Installing:
 gtk-vnc                            x86_64                     0.3.10-3.el6                     rhel-Server                      95 k
 gtk-vnc-python                     x86_64                     0.3.10-3.el6                     rhel-Server                      17 k

Transaction Summary
======================================================================================================================================
Install       2 Package(s)

Total download size: 111 k
Installed size: 284 k
Downloading Packages:
--------------------------------------------------------------------------------------------------------------------------------------
Total                                                                                                 2.4 MB/s | 111 kB     00:00    
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing : gtk-vnc-0.3.10-3.el6.x86_64                                                                                        1/2
  Installing : gtk-vnc-python-0.3.10-3.el6.x86_64                                                                                 2/2
  Verifying  : gtk-vnc-python-0.3.10-3.el6.x86_64                                                                                 1/2
  Verifying  : gtk-vnc-0.3.10-3.el6.x86_64                                                                                        2/2

Installed:
  gtk-vnc.x86_64 0:0.3.10-3.el6                                  gtk-vnc-python.x86_64 0:0.3.10-3.el6                                

Complete!

vncpasswd

more /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"

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@localhost ~]# service vncserver start

Starting VNC server: 1:root [FAILED]

[root@localhost /]# vncpasswd

Password:

Verify:

[root@localhost /]# su - etl

[etl@localhost ~]$ vncpasswd

Password:

Verify:

[etl@localhost ~]$

4、启动vncserver服务

[root@localhost ~]# 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。

clip_image004

#!/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@localhost ~]# su - etl

[etl@localhost ~]$ vi /home/etl/.vnc/xstartup

clip_image006

[root@localhost ~]# 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  ]

6、配置防火墙

如果你不配置防火墙，此时用VNC Viewer连接的话，一般会报："connect：Connection timed out(10060)"错误,如下所示：

clip_image008

clip_image010

一般这种情况要么关闭防火墙，要么需要配置防火墙。

[root@localhost ~]# service iptables stop

Flushing firewall rules: [  OK  ]

Setting chains to policy ACCEPT: filter [  OK  ]

Unloading iptables modules: [  OK  ]

关闭防火墙后，用VNCView连接服务器没有问题，但是一般不建议关闭防火墙，

[root@localhost ~]# service iptables restart

Flushing firewall rules: [  OK  ]

Setting chains to policy ACCEPT: filter [  OK  ]

Unloading iptables modules: [  OK  ]

Applying iptables firewall rules: [  OK  ]

Loading additional iptables modules: ip_conntrack_netbios_ns [  OK  ]

[root@localhost ~]# iptables -I INPUT -p tcp --dport 5901 -j ACCEPT

[root@localhost ~]# iptables -I INPUT -p tcp --dport 5902 -j ACCEPT

clip_image012

OK，可以通过VNC连接到服务器了

关于VNC服务使用的端口号与桌面号相关，VNC使用TCP端口从5900开始，对应关系如下
桌面号为“1” ---- 端口号为5901
桌面号为“2” ---- 端口号为5902
桌面号为“3” ---- 端口号为5903
……
基于Java的VNC客户程序Web服务TCP端口从5800开始，也是与桌面号相关，对应关系如下
桌面号为“1” ---- 端口号为5801
桌面号为“2” ---- 端口号为5802
桌面号为“3” ---- 端口号为5803
基于上面的介绍，如果Linux开启了防火墙功能，就需要手工开启相应的端口，以开启桌面号为“1”相应的端口为例，命令如下

开机自启动vncserver服务
# chkconfig vncserver on