How to Install and Configure VNC Server in CentOS 7


2018-10-26 11:07
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In this guide we’ll explain how to install and configureVNC Remote Access in latest release of CentOS 7 and RHEL 7 Desktop edition via tigervnc-server program.

VNC (Virtual Network Computing) is a server-client protocol which allows user accounts to remotely connect and control a distant system by using the resources provided by the Graphical User Interface.

Unlike other VNC servers available which connects directly to the runtime desktop, such as VNC X or Vino, tigervnc-vncserver uses a different mechanism that configures a standalone virtual desktop for each user.

Install and Configure VNC in CentOS 7

  1. Tigervnc-server is a program which executes an Xvnc server and starts parallel sessions of Gnome or other Desktop Environment on the VNC desktop.
    A started VNC user session can be accessed by same user from multiple VNC clients. In order to install TigerVNC server in CentOS 7, open a Terminal session and issue the following command with root privileges.
# yum install tigervnc-server
  1. After, you’ve installed the program, login with the user you want to run the VNC program and issue the below command in terminal in order to configure a password for the VNC server.
    Be aware that the password must be at least six characters length.
$ su - your_user  # If you want to configure VNC server to run under this user directly from CLI without switching users from GUI
$ vncpasswd
  1. Next, add a VNC service configuration file for your user via a daemon configuration file placed in systemd directory tree. In order to copy the VNC template file you need to run the following command with root privileges.
    If your user is not granted with sudo privileges, either switch directly to root account or run the command from an account with root privileges.
# cp /lib/systemd/system/vncserver@.service  /etc/systemd/system/vncserver@:1.service
  1. On the next step edit the copied VNC template configuration file from /etc/systemd/system/ directory and replace the values to reflect your user as shown in the below sample.
    The value of 1 after @ sign represents the display number (port 5900+display). Also, for each started VNC server, the port 5900 will be incremented by 1.
# vi /etc/systemd/system/vncserver@\:1.service