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[[https://bytexd.com/xrdp-debian/|Source article]]
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Install GNOME Desktop Environment
GNOME is one of the most popular, free, and open-source desktop environments. It mainly targets Linux systems but can also run on BSD. GNOME is an excellent alternative to proprietary options like KDE.

What makes GNOME popular is that it’s built on the idea of using multiple workspaces and managing them dynamically. GNOME allows users a lot of flexibility in terms of the desktop interface. They can even make it look like macOS or Windows.

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To install GNOME, run the following command:

sudo apt-get install task-gnome-desktop
You can read more about GNOME for Debian here: https://wiki.debian.org/Gnome

Install XFCE Desktop Environment
Xfce is one of the most lightweight desktop environments for Unix-like operating systems. It’s built to be fast, lightweight, user-friendly, and visually attractive.

Since Xfce embodies the Unix philosophy of reusability and modularity, it consists of separate packages that come together as a desktop environment. Users can select packages according to their needs and preferences.

Debian 11 XFCE Desktop Environment accessed via xRDP

To install XFCE, run the following command:

sudo apt install task-xfce-desktop
You can read more about XFCE for Debian here: https://wiki.debian.org/Xfce

Install MATE Desktop Environment
MATE is the continuation of GNOME 2, which was renamed MATE to avoid confusion with GNOME. The idea of MATE was born after the classic menu and taskbar were replaced in GNOME 3, which prompted unrest amongst the GNOME patriots. Several Linux distributions, including Debian, Fedora, and Linux Mint, have MATE available via the official repositories.

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To install MATE Desktop run the following command:

sudo apt install task-mate-desktop
You can read more about MATE for Debian here: https://wiki.debian.org/MATE

Install KDE Plasma Desktop Environment
KDE Plasma is the fifth and current version of KDE’s graphical workspace environments, primarily for Linux systems. It’s a user interface technology that can run on numerous devices including desktops, notebooks, tablets, smartphones, and even embedded devices.

KDE Plasma also introduced a new theme called Breeze. KDE’s graphical interface has migrated completely to QML (which uses OpenGL for hardware acceleration). That’s why KDE Plasma offers better performance alongside less power consumption.

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To install KDE Plasma Desktop, run the following command:

sudo apt install task-kde-desktop
You can read more about KDE Plasma for Debian here: https://wiki.debian.org/KDE

Install LXQt Desktop Environment
LXQt is among the minimalistic and lightweight desktop environments in Linux. It’s an excellent alternative to LXDE and provides the same lightweight, minimalistic environment. The only difference between the two is that LXQt uses Qt (standard toolkit for KDE) while LXDE uses GTK (standard toolkit for GNOME).

LXQt is the default desktop environment in many Linux distributions and can be installed as an alternative desktop in Debian and OpenSUSE.

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To install LXQt run the following command:

sudo apt install task-lxqt-desktop
While installing LXQt, you’ll be asked to select your preferred window manager. Here, I selected Openbox. You can read more about Window Managers here: https://wiki.debian.org/WindowManager

You can read more about LXQt for Debian here: https://wiki.debian.org/LXQt

Install LXDE Desktop Environment
LXDE (Lightweight X11 Desktop Environment) is another free desktop environment that requires low resources. LXDE uses less RAM and CPU, and it’s designed especially Phoronix for cloud computers with low hardware specifications.

According to some tests conducted by Phoronix in 2010, LXDE 0.5 has the lowest memory consumption. Phoronix tested the five most popular desktop environments, including GNOME 2.29, KDE Plasma desktop 4.4, and XFCE 4.6.

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To install LXDE, run the following command:

sudo apt install task-lxde-desktop
You can read more about LXDE for Debian here: https://wiki.debian.org/LXDE

Install Cinnamon Desktop Environment
The release of GNOME 3 brought about major unrest among GNOME loyalists because it replaced the traditional desktop metaphor or GNOME 2. That gave rise to two different desktop environments that maintained the convention, MATE (GNOME 2 continuation) and Cinnamon (GNOME 3 with traditional desktop metaphor). It’s the primary desktop environment for Linux Mint and comes as an optional desktop in other Linux distributions and Unix-like OS.

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To install Cinnamon Desktop, run the following command:\

sudo apt install task-cinnamon-desktop
There doesn’t seem to be an article for Cinnamon Desktop on https://wiki.debian.org

Installing Budgie Desktop Environment
Budgie is another desktop environment that’s developed using GNOME technologies like GTK (3.x and further). Budgie’s design is focused on simplicity and minimalism. Amongst other desktop environments like KDE and GNOME, Budgie tends to be lightweight and takes less storage space.

To install Budgie, run the following command:

sudo apt install budgie-desktop
Installing Openbox
Unlike GNOME, LXDE, and MATE, Openbox is not exactly a desktop environment. It’s a free and stacking windows manager for X Windows systems. A windows manager is the program that divides your screen into the boxes where the program runs.

Other popular desktop environments like LXDE and LXQt (the two most light-weight desktop environments) also use Openbox. It’s designed to be fast, small, and fully compliant with ICCCM (Inte-Client Communication Conventions Manual) and EWMH (Extended Window Manager Hints).

If not already installed along with other desktop environments, such as LXQt, then you can install it by itself. It can be useful since you can use it as a stripped-down desktop environment if you’re trying to reduce resource usage as much as possible.

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To install Openbox, run the following command:

sudo apt install openbox
You can read more about LXQt for Debian here: https://wiki.debian.org/Openbox

Switching Between Desktop Environments
You can install multiple desktop environments and switch between them.

The screenshots I’ve provided above are from all the desktop environments listed above, all installed on the same server.

To switch between desktop environments, run the following command:

sudo update-alternatives --config x-session-manager
You’ll be presented with a list of all the available desktop environments installed on the system, and you can select which one you want to be enabled:

There are 10 choices for the alternative x-session-manager (providing /usr/bin/x-session-manager).
  Selection    Path                       Priority   Status
------------------------------------------------------------
  0            /usr/bin/startlxqt          50        auto mode
  1            /usr/bin/cinnamon-session   50        manual mode
  2            /usr/bin/gnome-session      50        manual mode
  3            /usr/bin/lxsession          49        manual mode
  4            /usr/bin/mate-session       50        manual mode
  5            /usr/bin/openbox-session    40        manual mode
  6            /usr/bin/startkde           40        manual mode
  7            /usr/bin/startlxde          50        manual mode
* 8            /usr/bin/startlxqt          50        manual mode
  9            /usr/bin/startxfce4         50        manual mode
  10           /usr/bin/xfce4-session      40        manual mode
Press <enter> to keep the current choice[*], or type selection number: 4
The option marked by the * (asterisk) is the active desktop environment.

You can enter the number corresponding to the desktop environment you want to enable and press Enter.

You don’t need to restart xRDP for the changes to take effect.

Step 3 – Connecting to Your Debian 10/11 Machine using Remote Desktop Environment
If you’ve ever used RDP to connect to a Windows machine, you’ll know you usually provide the IP/hostname, username, and password to the remote desktop client, after which you’re logged into the remote machine.

In this case, you’ll fill in the IP/hostname in the remote desktop client app, and then you’ll be taken to a login screen on the remote machine, where you can fill in your username/password.

The login screen will look something like this:

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Connect from Windows
Windows comes with the Remote Desktop Connection app already installed.

To connect to your remote desktop, search for the Remote Desktop Connection app and run it.

In the app window, under Computer, fill in the IP or hostname of your remote machine and click Connect. You should then be presented with the login screen from the remote desktop, where you can fill in your username and password.

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Connect from OSX
First, download the Microsoft Remote Desktop App from the Mac App Store.

After you run it, you’ll see a button to Add PC – which means to add a configuration for connecting to a new remote desktop.

Click on it, and you’ll see a prompt where you can fill in some details. The minimum needed is the PC name, which is the IP or hostname of the remote machine.

After you’ve added it and connected to it, you’ll be presented with the login screen where you can enter your username/password.

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Connect from Linux
Multiple well-known remote desktop clients are connecting from Linux, but we’ll discuss Remmina. It’s very popular, and it’s the one I use.

Other popular solutions are rdesktop, FreeRDP, or Vinagre.

You can check the following article to see how to install Remmina on your distro https://remmina.org/how-to-install-remmina/

When you launch it, you can create a new desktop connection profile by clicking the + (plus) icon in the top left corner:

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After which, just give it a name (for easy reference), and select RDP – Remote Desktop Protocol in the Protocol dropdown.

In the Server section, fill in the IP or hostname of your remote machine and click Connect (to connect) or Save and Connect (to save the connection profile and immediately connect to the server).

Then, you’ll be taken to the login screen, where you can fill in the username and password.

Connect from iOS/Android
To connect to your remote machine via RDP, you’ll need to download the Microsoft Remote Desktop App.

For Android, the app is Remote Desktop 8
For iOS, the app is Remote Desktop Mobile
After it’s installed and you run it, you’ll see a button to Add Desktop. Tap this to fill in the connection details for your remote machine.

The minimum you need to add is the IP or hostname for your remote machine, and tap SAVE. After which, you can tap on the newly created desktop, and the connection should start, and the login screen displayed.

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Fix: Authentication Required Prompt
On some desktop environments, some nagging prompts require additional authentication.

You can dismiss them and continue the session without it popping up again, but that is a temporary fix, as it will pop up later.

Debian uses a framework called Polkit, which handles application authorization. It captures actions that the user is attempting to perform and checks if they are authorized or if they aren’t and need to authenticate for them to be authorized. Polkit reads some policy files to determine this.

What we’ll do is create such a policy file ourselves.

Create and edit the file with your preferred text editor.

sudo nano /etc/polkit-1/localauthority.conf.d/02-allow-colord.conf
Paste the following:

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" ||
 action.id == "org.freedesktop.packagekit.system-sources-refresh" || action.id == "org.freedesktop.packagekit.system-network-proxy-configure") &&
 subject.isInGroup("{users}")) {
 return polkit.Result.YES;
 }
});
The above should handle any of the following authentication warnings for users that belong to the user’s group (you can replace users with any other group you prefer).

The following are some common authentication warnings:

1. Authentication is required to refresh the system repositories
I’ve encountered this issue on Cinnamon Desktop.

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2. Authentication is required to create a color-managed device
I encountered this issue on GNOME.

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3. Authentication is required to set the network proxy used for downloading software
I encountered this issue on the KDE Plasma Desktop.

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xRDP Connection Slow/Laggy
If you’re experiencing a slow/laggy connection, then some of the best options to improve performance include:

Using a lightweight desktop environment
The most lightweight desktop environment among the ones listed above is Openbox. Other lightweight environments are LXQt, LXDE, and XFCE.

Improving Performance when connecting from Windows
Improve performance by reducing color depth & visual styles
You can do this right before connecting to the server.

In the Display tab, you can choose color depth. The lower it is, the faster the connection should be. You should test this yourself until you find what works for you.

In the Experience tab, you can select an option from the Performance dropdown. The higher in the list, the more performance you get, and the more visual styles are removed.

Also, you’ll want to check the Persistent bitmap caching in the Experience tab.

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Set Remote Desktop Connection Process Priority to Realtime
The next option is setting the RDC process priority to Realtime in Task Manager.

To do this, open Task Manager, locate Remote Desktop Connection->(Right-click on it), right-click, and click Go to details. This will take you to the Details tab and highlight mstsc.exe. Right-click on it and hover over Set priority->Realtime.

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Improving Performance when connecting from Linux
Improve performance by reducing color depth & visual styles
When creating a remote desktop connection profile, in the Basic tab, in the Color depth dropdown, reduce the color depth to a level you find acceptable.

In the Advanced tab, under Quality, select poorer quality to improve speed.

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Set Remote Desktop Connection Process Priority to Realtime
Launch the System Monitor, right-click on Remmina (or the process for the software you’re using for remote desktop connection), and go to Change Priority->Very High.

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Frequent Errors
Black Screen / Oh No! Something has gone wrong…
There seems to be an issue with the current versions of xrdp and xorgxrdp available in Debian 11. Instead of a black screen, I was now getting an error along the lines of “Oh No! Something has gone wrong….”

The solution that worked for me is from this comment on the Github issue:

Download the following versions of xorgxrdp and xrdp from https://snapshot.debian.org/:

wget https://snapshot.debian.org/archive/debian/20210302T032219Z/pool/main/x/xorgxrdp/xorgxrdp_0.2.15-1_amd64.deb
wget https://snapshot.debian.org/archive/debian/20210302T032219Z/pool/main/x/xrdp/xrdp_0.9.15-1_amd64.deb
These versions are still compatible with libc6 on Debian Bullseye. This is important to note, because I initially tried newer versions of xorgxrdp and xrdp and one of them required a newer version of libc6.
And install them:

sudo apt install ./xorgxrdp_0.2.15-1_amd64.deb
sudo apt install ./xrdp_0.9.15-1_amd64.deb
This should upgrade your existing xordxrdp and xrdp.

Now, when you connect via xRDP, the login screen will probably have Session: LoggingPerLogger selected in the dropdown.

Just select Xorg, click ok, and fill in your username and password.

xRDP Login Screen

Now, xRDP should work properly. In this case, the issues were with GNOME. After upgrading xorgxrdp and xrdp it works.

debian-gnome-desktop-xrdp

Thanks to Jibun no Kage commenting about this issue.
Conclusion
Hopefully, you’ve managed to install xRDP on your Debian 10/11 remote machine, connected to it using your preferred desktop environment, and optimized the connection for speed.

If you encounter any issues, then feel free to leave a comment or contact us, and we’ll get back to you as soon as possible.
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