It is an X Window System / X11 server for Android. X11 servers are generally faster when compared to VNC, but XSDL lacks the beautiful UI which a VNC Viewer might have. So it comes to your choice and what suits you the most.
- Download and install the XSDL app from the Play Store
- Open XSDL and wait until you see something similar to the screenshot below
- Now start OS and type the command inside the distro's shell-
export DISPLAY=127.0.0.1:0 && bash ~/.vnc/xstartup &
If you are on a Wi-Fi network and want to access XSDL from other devices, then change the command to :
export DISPLAY=192.168.0.100:0 && bash ~/.vnc/xstartup &