轉自：http://hi.baidu.com/daniel_tu/blog/item/aaf8ad1cd63c2c8e87d6b60b.html
1.查看VNC是否已經安裝：
$ rpm -q vnc vnc-server
vnc-4.1.2-24.fc8
vnc-server-4.1.2-24.fc8
我們一般用的是Tigervnc.
yum install -y tigervnc tigervnc-server
vnc是客戶端,vnc-server是服務器端
2.把用戶名加入到配置文件中：
# The VNCSERVERS variable is a list of display:user pairs.
#
# Uncomment the line below to start a VNC server on display :1
# 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/vnc/sshvnc.html
# VNCSERVERS="1:myusername"
VNCSERVERS="1:root"
3.用vncpasswd創建一個vnc的口令
注意這將同時在你的home目錄下，創建一個隱藏的目錄.vnc，其中有一個文件passwd保存着你的vnc口令.
Password:
Verify:
[root@localhost ~]# ls -d .vnc
.vnc
[root@localhost ~]# ls .vnc
passwd
4.啓動vnc服務.
Shutting down VNC server: 1:root [ OK ]
Starting VNC server: 1:root perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "zh_EN.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
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
[ OK ]
察看一下.vnc這個目錄的內容，應該類似於下面的東西.
[root@localhost .vnc]# ls
localhost.localdomain:1.log localhost.localdomain:2.log passwd
localhost.localdomain:1.pid localhost.localdomain:2.pid xstartup
[root@localhost .vnc]#
編輯這個名爲xstartup的腳本，注意到下面紅色的部分的註釋
將這兩行標記成紅色的內容前面的註釋符號去掉，否則你將只能得到一個什麼都沒有的灰屏。#!/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 &
因爲我們已經修改了啓動腳本，現在來重新啓動vncserver.
Shutting down VNC server: 1:root [ OK ]
Starting VNC server: 1:root perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "zh_EN.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
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
[ OK ]
[root@localhost .vnc]#
5.防火牆端口設置
在使用防火牆的情況下來連接到一個遠程系統,需要打開端口5901.
加入以下紅色的部分，然後重啓iptables服務。
[root@localhost ~]# sudo vi /etc/sysconfig/iptables
# Firewall configuration written by redhat-config-securitylevel
# Manual customization of this file is not recommended.
*filter
:INPUT ACCEPT [0]
:FORWARD ACCEPT [0]
:OUTPUT ACCEPT [0]
:RH-Firewall-1-INPUT - [0]
-A INPUT -j RH-Firewall-1-INPUT
-A FORWARD -j RH-Firewall-1-INPUT
-A RH-Firewall-1-INPUT -i lo -j ACCEPT
-A RH-Firewall-1-INPUT -p icmp --icmp-type any -j ACCEPT
-A RH-Firewall-1-INPUT -p 50 -j ACCEPT
-A RH-Firewall-1-INPUT -p 51 -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 5901 -j ACCEPT
-A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
COMMIT
[root@localhost ~]# sudo /sbin/service iptables restart
Flushing firewall rules: [ OK ]
Setting chains to policy ACCEPT: filter [ OK ]
Unloading iptables modules: [ OK ]
Applying iptables firewall rules: [ OK ]
[root@localhost ~]#
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1. 讓vncserver接受兩個不同的用戶:
當然你要爲兩個用戶分別運行vncpasswd來設置口令. 並且在你的防火牆修改中，你應該明白VNC使用端口5901給連接1用，如果象上面一樣要支持兩個用戶，應同時打開5901和5902.
2. 如果安裝了用客戶端vncviewer可以使用 vncviewer命令來遠程連接vncserver
[root@localhost ~]$ vncviewer localhost（或者用IP地址）:1
輸入你的vnc口令，就可以了