title: How to check the directory structure of a docker tar archive？
body: <p>The case is some users use <code>docker save</code> to get image archives and they send them to me. I would want to know the directory structure of that archive. For example if there is  /var , /root and /home/somefiles directories in an image? If I don't use <code>docker load  xxx.tar</code> and <code>docker run</code>, how to check the directory structure of the docker tar archive? Because I need to add some files to specified path in the image.</p>