title: How to cut 5th field in unix with pipe delimitor and how to find minimum date value from that field
body: <p>I have file, in that file 5th filed is date field . I want cut that field and find minimum value in that field.</p>
  
  <p>Pl help me.</p>
  
  <p>my date format is as follows:</p>
  
  <pre><code>05142013
  05132013
  05152013
  </code></pre>