LXDE + xrdp
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How to install Lightweight X11 Desktop Environment (LXDE) on Ubuntu.
apt-get update apt-get install lxde
Now when we have installed lxde, let's install xrdp
apt-get install xrdp
Restart your sysrem
reboot
Now you have Lightweight X11 Desktop Environment installed and operational. You can use remote desktop client to access it via rdp.