TUTORIAL: VNC

Since we've just edited vnc startup script, let's restart the vncserver.

[tchung@tchung101 tchung]$ sudo /sbin/service vncserver restart
Shutting down VNC server: 1:tchung                         [  OK  ]
Starting VNC server: 1:tchung                              [  OK  ]
[tchung@tchung101 tchung]$

So how do I connect to vncserver? Use vncviewer command in vnc client as following.

[tchung@tchung101 tchung]$ vncviewer localhost:1

Enter your vnc password and here is the result: Screenshot

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UPDATE:
To connect to a remote system with firewall, port 5901 needs to be open.
Add following line in red to open port 5901 and restart iptables service.

[tchung@tchung101 tchung]$ sudo vi /etc/sysconfig/iptables

# Firewall configuration written by redhat-config-securitylevel
# Manual customization of this file is not recommended.
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:RH-Firewall-1-INPUT - [0:0]
-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

[tchung@tchung101 tchung]$ 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  ]
[tchung@tchung101 tchung]$

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TIP by Forrest Taylor

To enable two different users in vncservers:

 
    VNCSERVERS="1:tchung 2:thomasc"

You will, of course have to run vncpasswd for both users. Also in your firewall update, you may want to clarify that VNC uses port 5901 for connection 1. If you had both users above, you would have to have ports 5901 and 5902 open.