title: Docker save without docker pull
body: <p>I would like to save a docker image as a tar file. I can</p>
  
  <pre><code>docker pull my_repo/image:latest
  docker save -o image.tar my_repo/image:latest
  </code></pre>
  
  <p>Is there a way to bypass the <strong>docker pull</strong>? What I would like to do is just</p>
  
  <pre><code>docker save -o image.tar my_repo/image:latest
  </code></pre>
  
  <p>When I try <strong>docker save</strong> alone I get:  Error response from daemon: reference does not exist</p>
  
  <p>Thanks</p>