title: How to filter grep results
body: <p>I'm running this command on OS X to pull the logic board ID:</p>
  
  <pre><code>ioreg -l | grep board-id
  </code></pre>
  
  <p>which gives me this output:</p>
  
  <pre><code>|   "board-id" = &lt;"Mac-FC02E91DDD3FA6A4"&gt;
  </code></pre>
  
  <p>The only part I'm interested in is the "Mac-FC02E91DDD3FA6A4". Is there a way to filter the results from grep to only show me this part? OR is there a second step I could do to clean up the grep results?</p>