How To Install VNC Server on CentOS 6

Install VNC Server on CentOS 6

In this tutorial, we will show you how to install VNC Server on CentOS 6. For those of you who didn’t know, VNC (Virtual Network Computing) server is free and open-source software that is designed for allowing remote access to the Desktop Environment of the server to the VNC Client whereas the VNC viewer is used on the remote computer to connect to the server. To use VNC you must have a TCP/IP connection and a VNC viewer client to connect to a computer running the VNC server component. The server transmits a duplicate display of a remote computer to the viewer.

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple. I will show you the step-by-step installation VNC server on CentOS 6.


  • A server running one of the following operating systems: CentOS 6.
  • It’s recommended that you use a fresh OS install to prevent any potential issues.
  • SSH access to the server (or just open Terminal if you’re on a desktop).
  • A non-root sudo user or access to the root user. We recommend acting as a non-root sudo user, however, as you can harm your system if you’re not careful when acting as the root.

Install VNC Server on CentOS 6

Step 1. First, you need to update the system to ensure that we have all of the latest software installed.

yum update

Step 2. Install the required packages.

yum groupinstall Desktop
yum install tigervnc-server
yum install xorg-x11-fonts-Type1
yum install vnc

Step 2. Enabling VNC Server service.

service vncserver start
chkconfig vncserver on

Step 4. Create a VNC password for the user.


Step 5. Configure VNC server.

nano /etc/sysconfig/vncservers

Add the following to the end of the file:

VNCSERVERARGS[1]="-geometry 1024x600"

Step 6. Configure firewall rules to allow the VNC connection.

iptables -A INPUT -m state --state NEW -m tcp -p tcp --dport 5801  -j ACCEPT
iptables -A INPUT -m state --state NEW -m tcp -p tcp --dport 5901  -j ACCEPT
iptables -A INPUT -m state --state NEW -m tcp -p tcp --dport 6001  -j ACCEPT
service iptables save
service iptables restart

Step 7. Setting Gnome session VNC.

Restart VNC service.

service vncserver restart

Now kill the VNC Server:

vncserver -kill :1

Edit the xstartup file in .vnc directory:

nano .vnc/xstartup

Comment the last line and run the Gnome:

#twm & 
exec gnome-session &

Restart the service:

service vncserver restart

Step 8.
Now go to your Windows or Linux machine and download the VNC Viewer client and install it in your system to access the desktop. Now you can able to connect the VNC server using IP and Port ( Eg: and you will be asked to enter the password, and enter the password that you have created earlier.

Install VNC Server on CentOS 6

Install VNC Server on CentOS 6

Congratulations! You have successfully installed the VNC. Thanks for using this tutorial for installing the VNC server on CentOS 6 system. For additional help or useful information, we recommend you check the official VNC website.

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r00t is a seasoned Linux system administrator with a wealth of experience in the field. Known for his contributions to idroot.us, r00t has authored numerous tutorials and guides, helping users navigate the complexities of Linux systems. His expertise spans across various Linux distributions, including Ubuntu, CentOS, and Debian. r00t's work is characterized by his ability to simplify complex concepts, making Linux more accessible to users of all skill levels. His dedication to the Linux community and his commitment to sharing knowledge makes him a respected figure in the field.
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