title: Where's docker's daemon.json? (missing)
body: <p>From <a href="https://docs.docker.com/engine/reference/commandline/dockerd//" rel="noreferrer">docs</a>:</p>
  
  <blockquote>
    <p>The default location of the configuration file on Linux is
    /etc/docker/daemon.json</p>
  </blockquote>
  
  <p>But I don't have it on my fresh docker installation:</p>
  
  <pre><code># docker --version
  Docker version 17.03.1-ce, build c6d412e
  # ls -la /etc/docker/
  total 12
  drwx------  2 root root 4096 Apr 28 17:58 .
  drwxr-xr-x 96 root root 4096 Apr 28 17:58 ..
  -rw-------  1 root root  244 Apr 28 17:58 key.json
  # lsb_release -cs
  trusty
  </code></pre>