title: How to use ssh agent forwarding with "vagrant ssh"?
body: <p>Rather than create a new SSH key pair on a vagrant box, I would like to re-use the key pair I have on my host machine, using <a href="http://www.unixwiz.net/techtips/ssh-agent-forwarding.html" rel="noreferrer">agent forwarding</a>. I've tried setting <a href="http://vagrantup.com/v1/docs/config/ssh/forward_agent.html" rel="noreferrer">config.ssh.forward_agent</a> to TRUE in the Vagrantfile, then rebooted the VM, and tried using:</p>
  
  <pre><code>vagrant ssh -- -A
  </code></pre>
  
  <p>...but I'm still getting prompted for a password when I try to do a git checkout. Any idea what I'm missing?</p>