VNC Server Configure

VNC is a protocol that is used to share the desktop with other users/computers over the network/Internet. In order to share a desktop, VNC server must be install and configure on the computer and VNC client must be run on the computer that will access the shared desktop.

But some people prefer GUI instead and for this they install Full version of Gnome on CentOS/RHEL. Actually there is a better way and that is to install VNC. VNC provides a lightweight virtual desktop than full blown version of Gnome.

To run the VNC Server on CentOS/RHEL, we have to install these required packages:

[root@rhel6 ~]# yum groupinstall Desktop

[root@rhel6 ~]# yum install tigervnc-server

[root@rhel6 ~]# yum install vnc

To start VNC Server on boot

[root@rhel6 ~]# chkconfig vncserver on

To setup users’ VNC password:

[root@rhel6 ~]# vncpasswd

Password: ******

Verify: ******

Edit the /etc/sysconfig/vncservers file and add the following to the end of the file:

[root@rhel6 ~]# vim /etc/sysconfig/vncservers

#VNCSERVERS=”2:myusername”

#VNCSERVERARGS[2]=”-geometry 800x600” –nolisten tcp –localhost”

VNCSERVERS=”1:root”                     [ New Entry] 

VNCSERVERARGS[1]=”-geometry 1024x600”   [ New Entry]

Restart the VNC Server:

[root@rhel6 ~]# service vncserver restart

Edit the xstartup file in .vnc directory and Comment the last line and run the Gnome:

[root@rhel6 ~]# vim /root/.vnc/xstartup

#twm &                        [comment this line]

Exec gnome-session &          [New Entry ]

Restart the service:

[root@rhel6 ~]# service vncserver restart

Now, download VNCViewer onto our desktop computer from which we want to access the shared desktop. Connect using ServerIP/Name:1 (:1 is for the VNC server window), In my case it is 192.168.1.122:1.

Enter the password that we created using the vncpasswd command

We now have GUI access to our server.

Ability to connect for multiple users:

Create a local user, using the following command:

Create a password for newly created user:

Switch to the newly created user and run vncpasswd command for it:

Edit the /etc/sysconfig/vncservers file:

[root@rhel6 ~]# vim /etc/sysconfig/vncservers

Add these lines for new user:

VNCSERVERS="1:arbab 2:ali"

VNCSERVERARGS[1]="-geometry 1024x600"

VNCSERVERARGS[2]="-geometry 1024x600"

Restart the VNC service:

sudo service vncserver restart

Modify the file so it looks like this:

#twm &

exec gnome-session &

Restart the VNC service:

Connect with newly created user using centos:2, Where centos is my server name:

Enter the password that we created using the vncpasswd command:

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