title: How do I associate a Vagrant project directory with an existing VirtualBox VM?
body: <p>Somehow my Vagrant project has disassociated itself from its VirtualBox VM, so that when I <code>vagrant up</code> Vagrant will import the base-box and create a new virtual machine.</p>
  
  <p>Is there a way to re-associate the Vagrant project with the existing VM?
  How does Vagrant internally associate a Vagrantfile with a VirtualBox VM directory?</p>