title: grep out load average from uptime
body: <p>what I want to do is take the command uptime, and get the load averages </p>
  
  <pre><code>$ uptime
  07:01:30 up 20:29,  2 users,  load average: 0.32, 0.39, 0.54
  </code></pre>
  
  <p>I have a feeling this is something I can do with awk, but I am not quite sure how.
  pls assist. </p>