How to Install and Configure TigerVNC Server on CentOS 7.1 / RHEL 7.1 / Oracle Linux 7

The following article explain how to Install and configure TigerVNC Server on CentOS 7.1 or Red Hat Enterprise Linux (RHEL 7.1) or Oracle Linux 7. TigerVNC (Tiger Virtual Network Computing) is a remote access utility that allows you to control other computers that running graphical desktop sharing in separate sessions in parallel. It is works on the client-server principle: a server shares its output (vncserver) and a client (vncviewer) connects to the server. TigerVNC in RHEL 7 or CentOS 7 or Oracle Linux 7 uses the systemd system management daemon for its configuration. The /etc/sysconfig/vncserver configuration file has been replaced by /etc/systemd/system/vncserver@.service.

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Install and Configure TigerVNC Server on Linux

1. Install tigervnc-server

# yum install tigervnc-server -y

2. Copy this file to /etc/systemd/system/vncserver@:.service :

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

3. Edit and vncserver parameters appropriately

# vi /etc/systemd/system/vncserver@:1.service

Replace with actual user hat exist on the linux (e.g ehowstuff)

[Unit]
Description=Remote desktop service (VNC)
After=syslog.target network.target

[Service]
Type=forking
# 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 ehowstuff -c "/usr/bin/vncserver %i"
PIDFile=/home/ehowstuff/.vnc/%H%i.pid
ExecStop=/bin/sh -c '/usr/bin/vncserver -kill %i > /dev/null 2>&1 || :'

[Install]
WantedBy=multi-user.target

4. Run `systemctl daemon-reload` to make the changes take effect immediately :

# systemctl daemon-reload

5. Set the password for the user or users defined in the configuration file. Note that you need to switch from root to USER first.

# su - ehowstuff
$ vncpasswd
Password:
Verify:

6. To start the service, specify the display number directly in the command :

# systemctl start vncserver@:1.service

7. Enable the service to start automatically at system start

# systemctl enable vncserver@:1.service

8. Add firewall rules to allow the VNC connection :

# firewall-cmd --permanent --zone=public --add-port 5901/tcp
# systemctl restart firewalld.service

9. Run VNC viewer :
Configure TigerVNC Server

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