Install vnc on centos Linux and how to connect clients to it

Vnc or Virtual Network Computing is a two-way communication between server and client that allows users to graphically manage server resources, in this tutorial on how to install vnc on centos Linux .

Steps to Install vnc on Linux

Tigervnc-server is a program that allows Xvnc to simultaneously control sessions in parallel with Gnome or any desktop user interface on Linux, and also enables the ability to simultaneously connect multiple users to a single server with the same username. .

To install tigervnc-server on centos 7 Linux just log in with root access to your server first, if you are not familiar with how to connect to ssh you can use the tutorial we have published on this site.

After login, just enter the following command into your ssh server environment.

  tigervnc-server

After installing vnc on Linux you need to log in to the user you want to enable vnc on the following command.

  su - your_user

Enter your username instead of your_user, now you must select a password for your username, just note that this password must be at least 6 characters long.

  vncpasswd

You should now configure the vnc service config file for the user you want by following the command with root access to the config files path in the systemd directory.

  cp /lib/systemd/system/vncserver@.service /etc/systemd/system/vncserver@:1.service

At this point you should open the file you copied to / etc / systemd / system / with an editor and add the following lines to it.

  nano /etc/systemd/system/vncserver@\:1.service
  [Unit]
 Description = Remote desktop service (VNC)
 After = syslog.target network.target
 [Service]
 Type = forking
 ExecStartPre = / bin / sh -c '/ usr / bin / vncserver -kill% i> / dev / null 2> & 1 ||  : '
 ExecStart = / sbin / runuser -l my_user -c "/ usr / bin / vncserver% i -geometry 1280x1024"
 PIDFile = / home / my_user / .vnc /% H% i.pid
 ExecStop = / bin / sh -c '/ usr / bin / vncserver -kill% i> / dev / null 2> & 1 ||  : '
 [Install]
 WantedBy = multi-user.target

Replace your_user with your username in the code above.

After making the changes to the following commands, we will activate the TigerVNC service and check the status of the VNC service with the following commands.

  systemctl daemon-reload
 systemctl start vncserver @: 1
 systemctl status vncserver @: 1
 systemctl enable vncserver @: 1

Now to make sure the vnc service is enabled by the ss command, we will check the open server ports and port 5901 / TCP must be enabled on the server.

  ss -tulpn |  grep vnc

listening port - Install vnc on Linux

In the last step of installing vnc on Linux you need to make sure port 5901 is not fired

on the server by the firewall. do.

  firewall-cmd --add-port = 5901 / tcp
 firewall-cmd --add-port = 5901 / tcp - permanent

Connection to vnc server by vnc client

Virtually all operating systems can be connected to a vnc server,

Windows operating system can be graphically connected to the server by RealVNC Viewer software.

To connect to the vnc server,

just run RealVNC Viewer and install the ip and port port

of the server as the socket address as you see in the picture and hit Enter.

login - Install vnc on Linux

After connecting to the vnc server,

a message with the name “connection is not encrypted” will appear as in the picture below,

click the Continue button to reject the message. Now you need to enter the password and click Ok.

warning - Install vnc on Linux

After this step you will be connected to vnc,

if a message that you do not have root access appears click Cancel to delete this message.

On Linux operating system you can also install vnc client with vinagre software and act as Windows connection.

You can use the following command to install vnc client on centos Linux.

  yum install vinagre

You have completed the tutorial on installing vnc on linux centos and how to connect it,

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