title: Setting up a display environment variable for a remote unix system
body: <p>Trying to get some graphical network simulator (ns2) code to display from my university's unix system. My local OS is Ubuntu 10 and I am accessing the unix system through PuTTY SSH client. When some prewritten code is executed, the following error prompt occurs: </p>
  
  <pre><code>no display name and no $DISPLAY environment variable</code></pre>
  
  <p>What can be done to get remotely executed code to display on my system? I am a total novice with unix and my attempts at redefining the $DISPLAY env var were spectacular failures. Thanks. Appreciated.</p>