title: How to do a mass rename?
body: <p>I need to rename files names like this</p>
  
  <pre><code>transform.php?dappName=Test&amp;transformer=YAML&amp;v_id=XXXXX
  </code></pre>
  
  <p>to just this</p>
  
  <pre><code>XXXXX.txt
  </code></pre>
  
  <p>How can I do it?</p>
  
  <p>I understand that i need more than one <code>mv</code> command because they are at least 25000 files.</p>