title: Shell script shebang for unknown path
body: <p>Is it possible to specify a shebang line without knowing the path of the program you want to do the executing?</p>
  
  <p>maybe don't specify the path</p>
  
  <pre><code>#!node
  </code></pre>
  
  <p>or specify several options</p>
  
  <pre><code>#!/usr/local/bin/node
  #!/usr/bin/node
  </code></pre>
  
  <p>Extra points for cross platform solution (various flavors of linux, BSD, OSX etc...)</p>