title: Launch a container with Docker without specifying command
body: <p>I'm familiar with LXC and wanted to try out docker. The issue I'm facing is that I can't find a way to just tell docker to start a container in the background, without executing a command. For example, with LXC I would do :</p>
  
  <p><code>lxc create -t ubuntu -n my_container</code></p>
  
  <p><code>lxc-start -n my_container -d</code></p>
  
  <p>At this point I would have a running container I can use as any VM (ssh to it, install stuff in it ...)
  It seems that docker prevent this kind of usage. Am I missing something ?</p>