title: What's the simplest way to monitor for changes to a single file?
body: <p>Should I look at shell notifications? Is there a good free component, or some example source code?</p>
  
  <p>Or should I just start a one second timer and check the file's timestamp periodically?</p>
  
  <p>It doesn't have to be elegant, just the simplest that will work. I am more interested in the processing which I will do when the file changes (it's a log file, whenever it gets updated I want to parse it and show some details of the test run).</p>