Install VNC Server on AWS Ubuntu Linux (For accessing a graphical environment)

Here is the link that will help you for doing that :

https://ubuntu.com/tutorials/ubuntu-desktop-aws#1-overview

Then from a Windows machine, download TightVNC at :

https://www.tightvnc.com/download.php

And when entering the remote AWS Ubuntu machine address in TightVNC, don't forget to append "::5901" at the end of the URL.

If you want to change the displayed resolution when connecting from TighVNC client, then, on the Ubuntu Linux machine do the following :

vncserver -kill :1

vncserver -geometry 1600x1200

And connect again from your TightVNC client on the remote (Windows) machine.