title: Amazon EC2 - last command error
body: <p>I just got an Amazon EC2 micro instance with Ubuntu 12.04.
  The problem is that the <code>last</code> command isn't working ...</p>
  
  <p>The error message is :</p>
  
  <pre><code>last: /var/log/wtmp: No such file or directory
  Perhaps this file was removed by the operator to prevent logging last info.
  </code></pre>
  
  <p>Thanks in advance !</p>