https://www.tecmint.com/install-xrdp-on-ubuntu/
sudo apt install ubuntu-desktop && sudo apt install xrdp && sudo systemctl status xrdp && sudo adduser ubuntu ssl-cert
Black screen fix
sudo nano /etc/xrdp/startwm.sh
Add these lines just before the lines that test & execute Xsession as shown in the screenshot below.
unset DBUS_SESSION_BUS_ADDRESS
unset XDG_RUNTIME_DIR
sudo nano /etc/xrdp/startwm.sh
In this file, replace the lines
test -x /etc/X11/Xsession && exec /etc/X11/Xsession
exec /bin/sh /etc/X11/Xsession
with startxfce4
sudo systemctl restart xrdp
Run a reverse tunnel on cloudflared
cloudflared access ssh --hostname rdp-benihime.kaizoku.cyou --url localhost:6665
You have to do sudo passwd rdp_user.
In our case, it's sudo passwd ubuntu.