title: Must specify at least one container source
body: <p>I am trying to save a Docker image inside VM so that I can load to my windows.
  While saving the images, I got an error stating "permission is denied" to create a .tar file.</p>
  
  <pre><code>docker save -o /mnt/sda1/var/lib/docker/tensorflow.tar user/tensorflow-serving-devel
  </code></pre>
  
  <p>user/tensorflow-serving-devel is the image ID here . Trying this gave me: </p>
  
  <blockquote>
    <p>open /mnt/sda1/var/lib/docker/.docker_temp_783580193: permission denied.</p>
  </blockquote>
  
  <p>I am using Docker Toolbox here. I referred <a href="https://stackoverflow.com/questions/23935141/how-to-copy-docker-images-from-one-host-to-another-without-via-repository">to this question</a> to create the .tar file. </p>
  
  <p><a href="https://i.stack.imgur.com/wdbWq.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/wdbWq.jpg" alt="enter image description here"></a></p>
  
  <p>Edit : I created the file .tar by</p>
  
  <pre><code>docker@default : docker save -o tensorflow.tar user/tensorflow-serving-devel
  docker@default : ls \
  &gt;
  tensorflow.tar
  docker@default : docker cp tensorflow.tar /c/Users/usr/Downloads/
  </code></pre>
  
  <p>Error:</p>
  
  <blockquote>
    <p>must specify at least one container source</p>
  </blockquote>
  
  <p>How do I copy this .tar file that container image?</p>