title: change time format for ps time in unix
body: <p>I am trying to get back the time in the format <strong>hh:mm</strong> without the seconds,
  running this:</p>
  
  <pre><code> ps -p $pid -o time=
  </code></pre>
  
  <p>gets back (<em>for example</em>) <code>00:03:19</code> but I want just (<em>for example</em>) <code>00:03</code></p>
  
  <p>I have tried looking at the manual and searched on the net, couldn't find anything that i can understand. Can someone help me please. Thanks in advance.</p>