title: DOCKER_TLS_VERIFY, DOCKER_HOST, and DOCKER_CERT_PATH on Ubuntu
body: <p>If <code>DOCKER_TLS_VERIFY</code>, <code>DOCKER_HOST</code> and <code>DOCKER_CERT_PATH</code> are not set on Ubuntu, what are the defaults to export the vars by myself (I'm not using Docker Machine)?</p>
  
  <pre><code>ps aux | grep "docker daemon"
  </code></pre>
  
  <p>returns this:</p>
  
  <pre><code>root       1828  2.4  0.5 764036 44804 ?        Ssl  21:32   0:01 /usr/bin/docker daemon --raw-logs
  alexzei+   6557  0.0  0.0  15948  2268 pts/15   S+   21:33   0:00 grep --color=auto docker daemon
  </code></pre>