title: Running Opencv from the remote machine
body: <p>I have login into the Linux machine from my windows machine using <code>ssh -X username@host</code>.
  I am trying to run my OpenCV python program but it is showing error -</p>
  
  <blockquote>
    <p>Unable to init server: Could not connect:  Connection refused(Frame:21109): Gtk-WARNING **: 09:38:23.942: cannot open display:</p>
  </blockquote>
  
  <p>I tried setting <code>export DISPLAY=:0</code> but it seems to not work</p>