title: unix shell, tail -f from last occurence of pattern
body: <p>I have very large log file, which contains log of service restart messages. After I initiated service restart with external command I need to tail this log file from last occurrence of reboot message and check following messages to confirm correct restart procedure. I'm analysing messages by python, so only find last occurrence and follow file needed, then i check output line-by-line and simply close connection when read everything I need.</p>
  
  <pre><code>.... # lots of previous data
  [timestamp] previous message
  [timestamp] Rebooting... # from tis point i need to track messages
  [timestamp] doing thing
  [timestamp] doing other thing
  [timestamp] doing final thing # final point, reboot successful
  [timestamp] service activity message # 
  </code></pre>
  
  <p>How can I perform such tailing?</p>
  
  <pre><code>tail -f &lt;from last Rebooting... message&gt;
  </code></pre>