title: Docker - var/lib/docker/layers folder content
body: <p>What does exactly <code>var/lib/docker/layers</code> contains? I found, that: </p>
  
  <blockquote>
    <p>Infomation about docker layer</p>
  </blockquote>
  
  <p>I have checked out and in it is a file for every container, which contains several characters or empty. I haven't found any logic in content.</p>