title: Bash Regex TimeStamp Matching
body: <p>Im trying to get unix timestamps from a log file from 5pm-12am.</p>
  
  <p>Here is the command that i tried or currently using.</p>
  
  <pre><code>cat test.log | grep 130805"(1[7-9]|2[0-3])"????
  </code></pre>
  
  <p>I would like to get timestamps like the following below :</p>
  
  <pre><code>130805223755 
  130805213755 
  130805173755
  </code></pre>
  
  <p>I cannot seem to get the right pattern match to get the timestamps above. Asking for your assistance tnx in advance.</p>