title: vagrant: Share ssh folder between host and guest
body: <p>In order to <code>bundle</code> and connect to Github as my normal self within my VM, I'd like to <code>config.vm.share_folder "ssh", "/home/vagrant/.ssh", "~/.ssh"</code>.</p>
  
  <p>Except this breaks vagrant's public/private key authentication.</p>
  
  <h3>Attempted Solution #1</h3>
  
  <p>I tried to copy my public key to also be <code>authorized_keys</code>. Same behavior; I need to enter a password to <code>vagrant ssh</code>.</p>
  
  <h3>Attempted Solution #2</h3>
  
  <p>Copy the public key to <code>authorized_keys</code>, but also set <code>config.ssh.private_key_path = "~/.ssh/id_dsa"</code>. This just screwed everything up, though.</p>