title: How to ssh into docker-machine VirtualBox instance?
body: <p>docker-machine version 0.2.0
  docker version 1.6.2</p>
  
  <p>I'm using <a href="https://docs.docker.com/machine/#getting-started-with-docker-machine-using-a-local-vm" rel="noreferrer">docker-machine to create a machine using VirtualBox</a>.  Everything works fine but I'd like to ssh into the machine itself and I find no instructions on how to do this.  I can connect to the ssh port:</p>
  
  <pre><code>ssh $(docker-machine ip dev)
  </code></pre>
  
  <p>But I've no idea what username / password / identity file to use.</p>