Install
and Configure VNC Server in CentOS 7 and RHEL 7
VNC (Virtual Network Computing)
Server allows the remote Desktop sharing using remote VNC clients like VNC
viewer. In CentOS 7 & RHEL 7 package named “tigervnc-server” needs to be installed in order to setup the VNC server.
In this article we will go
through the installation and configuration of VNC Server on CentOS 7 / RHEL 7.
Step:1 Make Sure the Desktop Packages are installed
In order to setup VNC server
first we make sure that Desktop is installed ,in My case i am using Gnome
Desktop. If Gnome Desktop is not installed on your Linux machine then use the
below command to install.
[root@linuxtechi ~]# yum groupinstall "GNOME Desktop"
Step:2 Install Tigervnc and other dependency Package.
Step:3 Setup VNC Server Configuration File.
Copy the VNC config file
“/lib/systemd/system/vncserver@.service” to the
“/etc/systemd/system/vncserver@:<Port_Number>.service”.
While Copying the VNC config
file we can mention the port number on which we want VNC service to be listen.
In my case i am using port 3 , it means VNC will listen on “5903”. So while
Connecting to the VNC server We can specify port number as <IP_Address_VNC_Server:3> or <IP_Address_VNC_Server:5903>
Step:4 Update the User’s Information in the Config File
[root@linuxtechi ~]# vi
/etc/systemd/system/vncserver@:3.service
Replace the “linuxtechi” user
as per your requirement. In my case linuxtechi user will able to control and
manage its desktop session using remote VNC clients.
Set the Firewall Rule if firewall is enabled on your linux box.
success
[root@linuxtechi ~]# firewall-cmd --reload
success
[root@linuxtechi ~]#
Step:5 Set the VNC password for the User.
Switch to the user (linuxtechi)
and run vncserver command to set the password as shown below :
Start and Enable the VNC Service at boot.
Execute below commands as root
only.
[root@linuxtechi ~]# systemctl start vncserver@:3.service
[root@linuxtechi ~]# systemctl enable vncserver@:3.service
ln -s '/etc/systemd/system/vncserver@:3.service' '/etc/systemd/system/multi-user.target.wants/vncserver@:3.service'
[root@linuxtechi ~]#
Step:6 Access Remote Desktop Session.
From Ubuntu Machine :
ubuntu@localhost:~$ vncviewer
192.168.1.15:3
Enter the VNC password that we
have set in above step, after validating the authentication Remote Desktop
session will start.
From Windows Machine Using VNC Viewer
Enter the VNC Server IP Address
and Port Number and then Click on OK
Enter the VNC Password &
then click on OK.
Desktop Session Will start
after authentication.
[root@tos02 ~]# cp /lib/systemd/system/vncserver@.service /etc/systemd/system/vncserver@:4.service
[root@tos02 ~]#
[root@tos02 ~]# vi /etc/systemd/system/vncserver@:4.service
[root@tos02 ~]# firewall-cmd --permanent --zone=public --add-port=5904/tcp
success
[root@tos02 ~]# firewall-cmd --reload
success
[root@tos02 ~]# su - oracle
Last login: Wed Jun 19 20:06:37 IST 2019 on pts/0
[oracle@tos02 ~]$
[oracle@tos02 ~]$
[oracle@tos02 ~]$ vncserver
New 'tos02.tosh.com:1 (oracle)' desktop is tos02.tosh.com:1
Starting applications specified in /home/oracle/.vnc/xstartup
Log file is /home/oracle/.vnc/tos02.tosh.com:1.log
[oracle@tos02 ~]$ firewall-cmd --reload
Authorization failed.
Make sure polkit agent is running or run the application as superuser.
[oracle@tos02 ~]$ exit
logout
[root@tos02 ~]#
[root@tos02 ~]# systemctl daemon-reload
[root@tos02 ~]# systemctl start vncserver@:4.service
[root@tos02 ~]# systemctl enable vncserver@:3.service
Failed to execute operation: File exists
[root@tos02 ~]# systemctl enable vncserver@:4.service
Created symlink from /etc/systemd/system/multi-user.target.wants/vncserver@:4.service to /etc/systemd/system/vncserver@:4.service.
[root@tos02 ~]# ln -s '/etc/systemd/system/vncserver@:4.service' '/etc/systemd/system/multi-user.target.wants/vncserver@:4.service'
ln: failed to create symbolic link â/etc/systemd/system/multi-user.target.wants/vncserver@:4.serviceâ: File exists
[root@tos02 ~]#
[root@tos02 ~]#
firewall-cmd --permanent --zone=public --add-port=5904/tcp
firewall-cmd --permanent
--zone=public --add-port=5901/tcp
firewall-cmd --permanent
--zone=public --add-port=5902/tcp
firewall-cmd --permanent
--zone=public --add-port=5903/tcp
success
[root@tos02 ~]#
firewall-cmd --reload
Success
SCREEN SETTING FULL MODE:
1.CONNECT vncviewer
2.screen will come
3.go to setting on top bar .
4.click option>display>custom setting and
put 1340X710 .As per your screen adjust it.