title: How to add line numbers to a file in Pentaho Data Integration (Kettle)?
body: <p>I have a file <code>names.txt</code> with this data:</p>
  
  <pre><code>NAME;AGE;
  alberto;22
  andrea;51
  ana;16
  </code></pre>
  
  <p>and I want to add a new column <code>N</code> with the line number of the row:</p>
  
  <pre><code>N;NAME;AGE;
  1;alberto;22
  2;andrea;51
  3;ana;16
  </code></pre>
  
  <p>I've been looking and what I found was something related with <code>Add sequence</code>. I tried but I don't know how.</p>
  
  <p>Thank you very much.</p>