title: Running process builder attempting to execute "source" command
body: <p>I'm running process builder and trying to source /etc/profile to be able to execute commands that work in a regular shell.</p>
  
  <pre><code>String args[] = {"source", "/etc/profile"};
  Process p = new ProcessBuilder(args).start();
  InputStream is = p.getInputStream();
  InputStreamReader isr = new InputStreamReader(is);
  BufferedReader br = new BufferedReader(isr);
  </code></pre>
  
  <p>Unfortunately it returns:</p>
  
  <pre><code>java.io.IOException: Cannot run program "source": java.io.IOException: error=2, No such file or directory
  </code></pre>
  
  <p>Any help greatly appreciated!</p>