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How to enable screen sharing between Ubuntu and RealVNC

How-to written and screenshots taken on 2020 March 6

I'm a GUI guy, so I need to "see" what I'm doing. I don't dislike or hate the command line (CLI), it's just that I can't remember every setting and file location. I have to see it. Now that's a problem with Linux as most is done through the command line in a terminal.

Now with Ubuntu, the GUI is pretty good. Well, good enough. But now we run in to another issue: a server normally doesn't have a monitor attached. So how can you see that GUI? In Windows this is done through the Remote Desktop app and the RDP protocol. This protocol isn't available by default on Ubuntu, but can be added through Xrdp.

But I think there is an easier way to view the Ubuntu GUI. The current default Ubuntu GUI has an option for screen sharing. This is done through the VNC protocol and works pretty good. In this guide I'll show you how to enable screen sharing between Ubuntu and RealVNC (on Windows, Mac or another Linux computer).

Enable screen sharing in Ubuntu

  1. On the server check if Vino is installed and do install if not. You can run the next command to do either one.

    sudo apt install vino
  2. When installing Ubuntu on the server I temporarily had a screen attached. This allowed me to do the installation and find the setting to enable screen sharing. Go to the Settings app and go to Sharing. Set Sharing to On (top right corner of the screen).

    The Sharing screen in the Ubuntu settings app

  3. Now click on Screen Sharing and set it this to On too. Select Allow connections to control screen and Require a password. The password can be only 8 characters long.

    Screen Sharing settings. Allow connections and set a password. Optionally select the network connection.

    Don't forget to select a network. If no networks are selectable try this:

    sudo touch /etc/NetworkManager/conf.d/10-globally-managed-devices.conf
  4. To connect to the server, I use the RealVNC viewer. It looks good and modern and you can save multiple connections (up to 5 for free). One problem with RealVNC is that it doesn't work with encrypted connections from Windows to Ubuntu.

    As Ubuntu requires encryption by default, we have to specifically allow unencrypted connections. Open a terminal to the Ubuntu server or on the server and enter the following command.

    gsettings set org.gnome.Vino require-encryption false

    Alternatively you can install the dconf-editor and disable this visually.

    sudo apt-get install dconf-editor

    Browse to org / gnome / desktop / remote-access or search for require-encryption and set to OFF.

    Set "require-encryption" to OFF in dconf-editor

  5. Open RealVNC viewer on your laptop or computer and connect to the IP-address or servername of the server followed by the port number; 5900. In my case: JDPNSR:5900. When the connection is made, the server will ask for the password set in step 3.

    Connect to server with RealVNC viewer. When successful it will ask for the password.

    Enabled screen sharing between Ubuntu and RealVNC