title: Delaying file data for several minutes
body: <p>On my machine, I have a file which is regenerated by an application every second - it contains different data each time, as it's based on some realtime data.</p>
  
  <p>I would like to have a copy of this file, which would contain <strong>what the original file contained 5 minutes ago</strong>. Is this somehow easily achievable? I would be happy to do this using some BASH scripting magic, but adding some wise, memory efficient code to that original application (written in c++) would also satisfy me :)</p>