參考
https://portal.databasemart.com/kb/a457/how-to-install-desktop-environment-and-xrdp-service-in-debian-9.aspx
1. 確保已經安裝桌面系統
如果沒有安裝，運行下面安裝，安裝完重啟。
tasksel
2. 安裝XRDP TigerVNC
apt-get install xrdp tigervnc-standalone-server
3. 啟動XRDP
systemctl start xrdp
systemctl enable xrdp