Launching GUI on RHEL ?

[Harry Hoffman]

Hi Priyadarshini,

It sounds like you have setup runlevel 5 (i.e. graphical login) just
fine. Normally to access the GUI you'd have a monitor hooked up to the
system or allow X connections over the network via XDM or the like.

The following assumes you have a vnc server running. This is a pretty
good assumption as you show it running with your command.

I would guess that the issue is that iptables (the host based firewall
on linux) is blocking access for the vnc server.

You can run the following command (this will open access to the whole
network):
/sbin/iptables -I INPUT -m tcp -p tcp --dport 5900 -j ACCEPT

If you want only from a specific machine or network then use this rule
but substitute MY_NETWORK for the ipaddres or cidr block that you want
to allow:
/sbin/iptables -I INPUT -m tcp -p tcp --dport 5900 --src MY_NETWORK -j
ACCEPT

Try to connect again with VNC. If everything works then you can save
your iptables changes like so:
/bin/cp /etc/sysconfig/iptables /etc/sysconfig/iptables-`date -I`
/sbin/iptables-save > /etc/sysconfig/iptables

This will make a backup of your current iptables config and then write
out the new one.

If you still can't connect just write back to the list.

Cheers,
Harry


On 10/04/2013 08:24 AM, Priyadarshini wrote:
> Hi logged in to rhel 6.4 using Putty using ssh.
> 
> Installed the GNOME desktop environment, using this command:
> 
> 
> yum groupinstall "X Window System" "KDE Desktop"
> 
> Now, followed steps below:
> 
> 
>    1. Run the following command to edit the /etc/inittab file:
> 
>    vi /etc/inittab
> 
>    2. Press the *I* key to enter insert mode.
>    3. Find the line that includes the text initdefault. Change the numeral 3
>     to 5.
>    4. Type :wq and press the *Enter* key to save the file and exit the
> *vi* text
>    editor.
> 
>    Reboot the system using the reboot command. Your system will restart and
>    present a graphical login
> 
> 
> 
> The problem is after reboot, grapghical login is not displayed.
> I tried running command vncserver got output:
> 
> 
> New 'z3-9-5-126-154:2 (root)' desktop is z3-9-5-126-154:2
> 
> Starting applications specified in /root/.vnc/xstartup
> Log file is /root/.vnc/z3-9-5-126-154:2.log
> 
> now, from windows laptop, I am trying to connect using vnc viewer but not
> able to connect.
> 
> Please help me how to launch GUI mode.
>