VNC stands for “Virtual Network Computing” is a sharing system or set of protocols for sharing desktop. There are many software available to access Linux based desktop remotely including, TigerVNC, TightVNC, Vino, vnc4server and more.
TigerVNC is a free, open-source and high-performance VNC server used to control or access Linux based desktop remotely. It is a client/server application that allows you to interact with graphical applications on remote machines.
In this tutorial, we will show you how to install and configure VNC server on Ubuntu 20.04.
Step 1 – Install Desktop Environment
By default, Ubuntu Server does not include a Desktop Environment. TigerVNC server is designed to controls only desktop systems. So you will need to add a desktop environment in your server.
First, update and upgrade all installed packages with the following command:
apt update -yapt upgrade -y
Once your system is updated, install the Tasksel utility to install a desktop environment:
apt install tasksel -y
After installing Tasksel, launch the Tasksel utility with the following command:
tasksel
You should see the following interface:
Use the arrow key to scroll down the list and find Ubuntu desktop. Next, press the Space key to select it then press the Tab key to select OK then hit Enter to install the Ubuntu desktop.
Once all the packages are installed, you will need to set your system boots into the graphical target. You can set it with the following command:
systemctl set-default graphical.target
Next, restart your system to apply the changes.
Step 2 – Install TigerVNC Server
By default, the TigerVNC package is available in the Ubuntu 20.04 default repository. You can install it by just running the following command:
apt install tigervnc-standalone-server -y
After installing TigerVNC, create a new user and set a VNC password for that user.
First, create a new user named hitesh with the following command:
adduser hitesh
Next, switch the user to hitesh and set a VNC password with the following command:
su - hiteshvncpasswd
Provide your desired password as shown below:
Password: Verify: Would you like to enter a view-only password (y/n)? n
Next, start the VNC server using the following command:
vncserver -localhost no
Once the VNC server is started, you should get the following output:
New 'ubuntu2004:1 (hitesh)' desktop at :1 on machine ubuntu2004 Starting applications specified in /etc/X11/Xvnc-session Log file is /home/hitesh/.vnc/ubuntu2004:1.log Use xtigervncviewer -SecurityTypes VncAuth,TLSVnc -passwd /home/hitesh/.vnc/passwd ubuntu2004:1 to connect to the VNC server.
You can verify your running VNC server using the following command:
vncserver -list
You should get the following output:
TigerVNC server sessions: X DISPLAY # RFB PORT # PROCESS ID :1 5901 1719
Step 3 – Install VNC Client
In this section, we will install the RealVNC VNC client on the remote machine and connect to the VNC server.
You can download the RealVNC client from the RealVNC download page.
Once the download is completed, install the downloaded package with the following command:
dpkg -i /home/vyom/Downloads/VNC-Viewer-6.20.529-Linux-x64.deb
Next, launch the VNC client from the Gnome application menu. Then, Click on the File menu => New connection to create a new connection. You should see the following screen:
Provide the Name and IP address along with VNC session ID :1 of your VNC server and click on the OK to save the connection. You should see your saved connection in the following screen:
Now, double click on your newly created connection. You will be asked to provide your VNC password as shown below:
Provide your VNC password and click on the OK. Once connected, you should see your Ubuntu desktop screen:
Step 4 – Configure VNC to Work with Your Desktop Environment
Before starting, stop the VNC instance using the vncserver command with a -kill option and the server session ID as an argument.
vncserver -kill :1
You should get the following output:
Killing Xtigervnc process ID 1719… success!
Next, you will need to configure TigerVNC to work with Gnome. You can do it by creating new file xstartup inside .vnc directory:
su - hiteshnano ~/.vnc/xstartup
Add the following lines:
#!/bin/sh exec /etc/vnc/xstartup xrdb $HOME/.Xresources vncconfig -iconic & dbus-launch --exit-with-session gnome-session &
Save and close the file when you are finished. The above script will be executed automatically whenever you start or restart the TigerVNC server.
Next, give execute permissions to the ~/.vnc/xstartup file:
chmod u+x ~/.vnc/xstartup
Step 5 – Create a Systemd Service File for VNC
Next, you will need to create a systemd file for TigerVNC to manage the VNC service. You can create it with the following command:
nano /etc/systemd/system/vncserver@.service
Add the following lines:
[Unit] Description=Remote desktop service (VNC) After=syslog.target network.target [Service] Type=simple User=hitesh PAMName=login PIDFile=/home/%u/.vnc/%H%i.pid ExecStartPre=/usr/bin/vncserver -kill :%i > /dev/null 2>&1 || : ExecStart=/usr/bin/vncserver :%i -localhost no -geometry 1024x768 ExecStop=/usr/bin/vncserver -kill :%i [Install] WantedBy=multi-user.target
Save and close the file then reload the systemd daemon with the following command:
systemctl daemon-reload
Next, enable the VNC service to start at system reboot with the following command:
systemctl enable vncserver@1.service
Next, start the VNC service with the following command:
systemctl start vncserver@1.service
Conclusion
Congratulations! you have successfully installed and setup the Tiger VNC server on Ubuntu 20.04. You can now connect your Ubuntu system from any desktop system and manage it with easy to use graphical interface.
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