HowTO: Install VNC Server On CentOS 6.3

1. Install Tigervnc Server

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1. [root@demo ~]# yum -y install tigervnc-server  

2. Install X Windows and GNOME.

This used to be yum groupinstall "X Window System" "GNOME Desktop Environment", but is now simply:

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1. yum groupinstall "X Window System" "Desktop"  

3. Create a user (or use and existing user) and create VNC login.

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1. [root@demo ~]# useradd david  
2. [root@demo ~]# passwd david  
3. Changing password for user david.  
4. New password:  
5. Retype new password:  
6. passwd: all authentication tokens updated successfully.  
7. [root@demo ~]# su - david  

4. Switch to the user (su - user) and issue 'vncpasswd' to set the VNC password

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1. [david@demo ~]$ vncpasswd  
2. Password:  
3. Verify:  
4. [david@demo ~]$  

5. Start VNC using 'vncserver :1'

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1. [david@demo ~]$ vncserver :1  
2. xauth:  creating new authority file /home/david/.Xauthority  
3.   
4. New 'demo.domain.net:1 (david)' desktop is demo.domain.net:1  
5.   
6. Creating default startup script /home/david/.vnc/xstartup  
7. Starting applications specified in /home/david/.vnc/xstartup  
8. Log file is /home/david/.vnc/demo.domain.net:1.log  
9.   
10. [david@demo ~]$  

6. Stop VNC using using 'vncserver -kill :1'

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1. [david@demo ~]$ vncserver -kill :1  

7. Setting resolution:

In /etc/sysconfig/vncservers, add a line for each user.

NOTE: if you if you need to install Oracle software, use geometry 1024x768.

You can also do this via the shell using: vncserver :1 -geometry 1024x768 -depth xx

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1. # The VNCSERVERS variable is a list of display:user pairs.  
2. #  
3. # Uncomment the lines below to start a VNC server on display :2  
4. # as my 'myusername' (adjust this to your own).  You will also  
5. # need to set a VNC password; run 'man vncpasswd' to see how  
6. # to do that.    
7. #  
8. # DO NOT RUN THIS SERVICE if your local area network is  
9. # untrusted!  For a secure way of using VNC, see this URL:  
10. # http://kbase.redhat.com/faq/docs/DOC-7028  
11.  
12. # Use "-nolisten tcp" to prevent X connections to your VNC server via TCP.  
13.  
14. # Use "-localhost" to prevent remote VNC clients connecting except when  
15. # doing so through a secure tunnel.  See the "-via" option in the  
16. # `man vncviewer' manual page.  
17.  
18. # VNCSERVERS="2:myusername"  
19. # VNCSERVERARGS[2]="-geometry 800x600 -nolisten tcp -localhost"  
20. VNCSERVERS="1:david"  
21. VNCSERVERARGS[1]="-geometry 1024x768"  

For multiple users, simply add the user to the VNCSERVERS list and add a VNCSERVERARGS[x] entry.

So for three users:

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1. VNCSERVERS="1:david 2:bill 3:john"  
2. VNCSERVERARGS[1]="-geometry 1024x768"  
3. VNCSERVERARGS[2]="-geometry 1024x768"  
4. VNCSERVERARGS[3]="-geometry 640x480"  

8. Open the port for the user, in this case 5801.

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1. -A INPUT -m state --state NEW -m tcp -p tcp --dport 5801 -j ACCEPT  

Save and restart IP Tables (/etc/init.d/iptables save | restart) 



Source: http://www.davidghedini.com/pg/entry/vnc_server_on_centos_6