title: Unable to start Docker on Oracle Linux
body: <p>I followed so many link, but did not get any working solution.</p>
  
  <pre><code>docker run hello-world
  docker: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?.
  </code></pre>
  
  <p>When I do</p>
  
  <pre><code>systemctl status docker.service
  ● docker.service - Docker Application Container Engine
     Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)
     Active: inactive (dead)
       Docs: https://docs.docker.com
  </code></pre>
  
  <p>When I execute</p>
  
  <pre><code>systemctl enable docker.service
  ==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-unit-files ===
  Authentication is required to manage system service or unit files.
  Authenticating as: vagrant
  Password:
  </code></pre>
  
  <p>I get above error. I am using Oracle Linux </p>
  
  <pre><code>uname -a
  Linux 10-10-150-104 3.10.0-693.el7.x86_64 #1 SMP Wed Aug 2 06:49:08 PDT 2017 x86_64 x86_64 x86_64 GNU/Linux 
  </code></pre>