title: How to parse xml sibling element value with SED
body: <p>I have a xml file which contains following text:</p>
  
  <pre><code>&lt;Cluster&gt;
       &lt;Name&gt;CLS_20&lt;/Name&gt;
       &lt;JMXUserName&gt;admin&lt;/JMXUserName&gt;
       &lt;JMXPassword&gt;mypwd&lt;/JMXPassword&gt;
  &lt;/Cluster&gt;
  &lt;Server&gt;
      &lt;Name&gt;Server_20&lt;/Name&gt;
      &lt;IpAddress&gt;a.b.c.d&lt;/IpAddress&gt;
      &lt;Port&gt;1234&lt;/Port&gt;
  &lt;/Server&gt;
  &lt;Server&gt;
      &lt;Name&gt;Server_21&lt;/Name&gt;
      &lt;IpAddress&gt;e.f.g.h&lt;/IpAddress&gt;
      &lt;Port&gt;1234&lt;/Port&gt;
  &lt;/Server&gt;
  </code></pre>
  
  <p>I have the IP address of the server (a.b.c.d)
  I want to retrieve name of the server (Server_20)</p>
  
  <p>How can this be achieved with SED
  Or with any other linux command.</p>
  
  <p>Please help.</p>