How To Install VNC Server on CentOS 7

Install VNC Server on CentOS 7

In this tutorial, we will show you how to install VNC Server on CentOS 7. 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.

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 7.


  • A server running one of the following operating systems: CentOS 7.
  • 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 7

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 Gnome desktop.

yum groupinstall "GNOME Desktop"

Step 3. Install Tigervnc server and X11 fonts.

yum install tigervnc-server xorg-x11-fonts-Type1

Copy the VNC server configuration file  /etc/systemd/system/ for configuring the system service. While copying, you can mention which port it should listen to. By default VNC server listens on 5900:

cp /lib/systemd/system/vncserver@.service /etc/systemd/system/vncserver@:5.service

Edit VNC server file configuration:

nano /etc/systemd/system/vncserver@:5.service
## Replace <USER> with your real user, in my case i replaced with user called “idroot” with the screen size ##
Description=Remote desktop service (VNC)
After=syslog.target network.target[Service]
# Clean any existing files in /tmp/.X11-unix environment
ExecStartPre=/bin/sh -c ‘/usr/bin/vncserver -kill %i > /dev/null 2>&1 || :’
ExecStart=/sbin/runuser -l idroot -c “/usr/bin/vncserver %i -geometry 1280×1024″
ExecStop=/bin/sh -c ‘/usr/bin/vncserver -kill %i > /dev/null 2>&1 || :'[Install]

Step 4. Configure firewall rules to allow the VNC connection.

firewall-cmd --permanent --zone=public --add-port=5905/tcp
firewall-cmd --reload

Step 5. Start the VNC server.


Set the password.

You will require a password to access your desktops.

xauth:  file /home/idroot/.Xauthority does not exist

New ‘localhost.localdomain:1 (idroot)’ desktop is server.idroot.us:1

Creating default startup script /home/idroot/.vnc/xstartup
Starting applications specified in /home/idroot/.vnc/xstartup
Log file is /home/idroot/.vnc/server.idroot.us:1.log

Step 6. Enabling and starting the VNC service

Reload the systemctl daemon as root.

systemctl daemon-reload

Start the VNC service as root:

systemctl start vncserver@:5.service

Enable it on system startup as root:

systemctl enable vncserver@:5.service

Step 7. 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 7

Install VNC Server on CentOS 7

Congratulations! You have successfully installed the VNC server. Thanks for using this tutorial for installing the VNC server on CentOS 7 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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