How to install xRDP and GNOME Desktop GUI on Ubuntu 20 operating system

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We will install xrdp on a server with Ubuntu 20.04 operating system and GNOME interface to connect via RDP from Windows. Follow the steps below in order.

First, update the server.

sudo apt update -y; sudo apt upgrade -y;

After the update, run the following command to install the GNOME desktop.

sudo apt-get install ubuntu-gnome-desktop;

To install xRDP, run the following commands in order.

sudo apt-get install -y xrdp;
sudo sed -i 's/allowed_users=console/allowed_users=anybody/' /etc/X11/Xwrapper.config;

After applying the commands from the previous step, RDP access should be available. To prevent the Ubuntu login screen from appearing after the RDP connection, run the following commands.

sudo nano /etc/polkit-1/localauthority.conf.d/02-allow-colord.conf

Paste the following section and save it.

polkit.addRule(function(action, subject) {
    if ((action.id == "org.freedesktop.color-manager.create-device" ||
         action.id == "org.freedesktop.color-manager.create-profile" ||
         action.id == "org.freedesktop.color-manager.delete-device" ||
         action.id == "org.freedesktop.color-manager.delete-profile" ||
         action.id == "org.freedesktop.color-manager.modify-device" ||
         action.id == "org.freedesktop.color-manager.modify-profile") &&
        subject.isInGroup("{group}")) {
        return polkit.Result.YES;
    }
});