Install
Install MateDesktop VNC and xrdp
apt-get install ubuntu-mate-core ubuntu-mate-desktop -y
apt-get install tightvncserver -y
apt-get install xrdp -y
Setting xrdp
echo mate-session >~/.xsession
vim /etc/xrdp/startwm.sh
# insert mate-session before ./etc/X11/Xsession`
reboot
Uninstall
apt-get purge xrdp
apt-get purge tightvncserver