title: Remove comma from a XML element in a file using UNIX commands
body: <p>I have a file in UNIX system. It is a big file of about 100 MB. It is an XML file. There is a particular XML tag:</p>
  
  <pre><code>&lt;XYZ&gt; 5,434 &lt;/XYZ&gt;
  </code></pre>
  
  <p>It contains a comma and I need to remove it.</p>
  
  <p>How should I go about doing this using UNIX commands?</p>