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====== Xrdp on Ubuntu 20.04 ======

https://linuxize.com/post/how-to-install-xrdp-on-ubuntu-20-04/


Xrdp is an open-source equivalent of Microsoft’s Remote Desktop Protocol (RDP). With xrdp installed on a Linux system, users can remotely access the Linux desktop using an RDP client as we shall demonstrate later in this article. It’s completely free to download and use.

Without much further ado, let’s see how you can install Xrdp on Ubuntu Desktop 20.04 and 18.04.

Prerequisites
This guide assumes that you already have a copy of the Ubuntu 20.04 or Ubuntu 18.04 desktop already installed. If you have a minimal installation – without a GUI – then installing a desktop environment (such as GNOME) is recommended.

To install the Ubuntu desktop environment, run the command:

<code bash>
$ sudo apt install ubuntu-desktop
</code>

===== Step 1: Install Xrdp on Ubuntu 20.04 =====

To start off, launch your terminal and invoke the following command to install Xrdp on your system.

<code bash>
$ sudo apt install xrdp
</code>

When prompted, just hit 'Y' and press enter to continue with the installation.
Xrdp service starts automatically upon installation. You can verify this by running the command:

<code bash>
$ sudo systemctl status xrdp
</code>

The output confirms, without a doubt, that the xrdp daemon is active and running.

===== Step 2: Configure Xrdp on Ubuntu 20.04 =====

When Xrdp is installed, an SSL certificate key – ssl-cert-snakeoil.key – is placed in the /etc/ssl/private/ folder. We need to add the xrdp user to the ssl-cert group to make the file readable to the user.

<code bash>
$ sudo adduser xrdp ssl-cert
</code>

Xrdp listens on port 3389 and if you are behind a UFW firewall, you need to open the port to allow inbound traffic from an RDP client. In this example, I will allow traffic from my entire subnet to the Ubuntu system.

<code bash>
$ sudo ufw allow from 192.168.2.0/24 to any port 3389
</code>
Thereafter, reload the firewall and confirm if the port has been opened.

<code bash>
$ sudo ufw reload
$ sudo ufw status
</code>


===== Step 3: Access Remote Ubuntu Desktop with RDP Client =====

In this step, we are going to access the Ubuntu desktop system from Windows 10 using the Remote Desktop Client. But before we do so, ensure that you first log out of Ubuntu 20.04. This because Xrdp only supports one Xsession.

Next, launch your client and key in your remote system’s IP address, and click the ‘Connect’ button.

===== Fix Black Ubuntu Screen =====

The solution is quite simple. Head over to the remote system and edit the /etc/xrdp/startwm.sh script.

<code bash>
$ sudo vim /etc/xrdp/startwm.sh
</code>
Add these lines just before the lines that test & execute Xsession as shown in the screenshot below.

<code bash>
unset DBUS_SESSION_BUS_ADDRESS
unset XDG_RUNTIME_DIR
</code>

Save the file and exit. Then restart the Xrdp service.

<code bash>
$ sudo systemctl restart xrdp
</code>
Next, reinitiate the connection. After the initial authentication, you will be required to authenticate again as shown.
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