Can not connect with Windows 10 Remote Desktop Connection Tool to my Ubuntu 20.04 VPS
Solution 1:
Well, did you have xrdp installed on your Ubuntu box? Linux OS did NOT install/use RDP by default. Only Windows OS do.
If you like to use RDP to a Linux OS, you have to install a RDP-Server first. and of course your Ubuntu needs to have a graphical frontend / GUI at all.
sudo apt-get install xrdp
does it for you. Then check that port 3389 is open in your firewall
sudo firewall-cmd --add-service rdp --permanent
sudo firewall-cmd --add-service rdp