title: Installing Mesa on ubuntu
body: <p>I am trying to install and use VTK on my 32-bit linux machine (EC2 instance on AWS).
  I was getting an error which i realized was because I did not have openGL/Mesa installed on my machine.
  So i installed Mesa using the following command: sudo apt-get install mesa-common-dev
  Now, I dont know where mesa is installed on my machine. There is no folder 'mesa' in /usr/lib/ and there is no libGl.so anywhere.
  Can anybody tell me how to proceed further?</p>