title: how can I extract drupal-x.x.tar.gz file
body: <p>I was download the the <strong>drupal-x.x.tar.gz</strong> on my machine.
  and trying to extract using following command provide by drupal</p>
  
  <pre><code>$ tar -xzvf drupal-x.x.tar.gz   
  $ tar -xf drupal-x.x.tar.gz
  </code></pre>
  
  <p>but It's not working, It's give following error. </p>
  
  <blockquote>
    <p><strong>tar: Unrecognized archive format</strong><br>
    <strong>tar: Error exit delayed from previous errors.</strong></p>
  </blockquote>
  
  <p>How can I extract this file?</p>