Rdp stands for Remote Desktop Protocol. Rdp is a Microsoft protocol to login remotely to windows.
Xrdp is an open source implementation of Rdp protocol. Xrdp gives you a graphical interface remotely.
Install Desktop Environment
Let us check first if Xrdp is already installed.
sudo systemctl status xrdp Unit xrdp.service could not be found.
To install run following command...
sudo apt install xrdp -y
Check the status again...
sudo systemctl status xrdp xrdp.service - xrdp daemon Loaded: loaded (/lib/systemd/system/xrdp.service; enabled; vendor preset: enabled) Active: active (running) since Wed 2020-08-19 20:33:50 UTC; 12s ago
Next we need to add xrdp to the ssl-cert group so that it can access /etc/ssl/private/ssl-cert-snakeoil.key
sudo adduser xrdp ssl-cert
Now if you run groups ssl-cert, you should see following...
groups xrdp xrdp : xrdp ssl-cert
Xrdp is in following directories...
whereis xrdp.ini xrdp: /usr/sbin/xrdp /usr/lib/x86_64-linux-gnu/xrdp /etc/xrdp /usr/share/xrdp /usr/share/man/man8/xrdp.8.gz
Out of all the above /etc/xrdp/xrdp.ini is the most important one. Whenever you make changes to the xrdp.ini file, you will have to restart the xrdp server.
sudo systemctl restart xrdp
By default xrdp listens on port 3389. You can check listening port using the lsof command...
lsof -i :3389 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME xrdp 23164 xrdp 11u IPv6 236866 0t0 TCP *:3389 (LISTEN)
Therefore we need to open up the port 3389.
sudo ufw allow 3389
Connect to the Xrdp Server
Now go to your PC and search for "Remote Desktop Connection" and enter the IP of the Ubuntu Server, username and password. You should be able to connect to Ubuntu server using rdp.