title: Only pull IP Address from a line of text
body: <p>I've got a script that searches through a logfile for a specific trigger, and then pulls out the line when it's found.  For example, this is a line I'm looking for:</p>
  
  <pre><code>7/2/10 9:24:12 AM puppetmasterd[63092] Could not resolve 10.13.1.190: no name for 10.13.1.190 
  </code></pre>
  
  <p>It saves this line into a variable "line", but I'd like to be able to extract only the IP Address.  </p>
  
  <p>Our IP Addresses all start with 10.13 - is there an easy way to search for that in this variable and then isolate ONLY the IP address into a variable?</p>