you just need to
vagrant up and everything is installed and configured for you to work.
$ vagrant up
Bringing machine ‘default’ up with ‘virtualbox’ provider…
[default] Resuming suspended VM…
[default] Booting VM…
[default] Waiting for VM to boot. This can take a few minutes.
[default] VM booted and ready for use!
$ vagrant ssh
Welcome to Ubuntu 12.04 LTS (GNU/Linux 3.2.0-23-generic-pae i686) * Documentation: https://help.ubuntu.com/
Welcome to your Vagrant-built virtual machine.
Last login: Thu May 16 23:37:26 2013 from 10.0.2.2
Vagrant remains and always will be a liberally licensed open source project