title: Clone docker image to dockerhub account
body: <p>Let's say one of the official <code>docker</code> base images <code>ubuntu:latest</code> and I have a <code>dockerhub</code> account <code>myaccount</code>. How to clone <code>ubuntu:latest</code> to <code>myaccount</code>'s repository? The work flow can then be introduced as follows,</p>
  
  <pre><code>$ docker pull myaccount/ubuntu:latest
  $ docker run -it myaccount/ubuntu:latest /bin/bash
  # root@mycontainer: apt-get install onepackage
  # root@mycontainer: exit
  $ docker commit mycontainer myaccount/ubuntu:latest-new
  $ docker push myaccount/ubuntu:latest-new
  </code></pre>
  
  <p>I need <code>push</code> just the delta <code>latest-new</code> minus <code>latest</code>.</p>