Old way to use vagrant. Don't use vagrant which is installed via gem.

gistfile1.md

# install vagrant
$ gem install vagrant

# download box
$ cd ~/Downloads; 
$ curl -L http://developer.nrel.gov/downloads/vagrant-boxes/CentOS-6.4-x86_64-v20130731.box -o CentOS-6.4-x86_64-v20130731.box

# add box
$ vagrant box add centos6.4-x86_64 ./CentOS-6.4-x86_64-v20130309.box

# initialize
$ mkdir ~/vagrant; cd ~/vagrant
$ vagrant init centos6.4-x86_64

$ cat Vagrantfile

# -*- mode: ruby -*-                                                                                                                                                                            
# vi: set ft=ruby :                                                                                                                                                                             
                                                                                                                                                                                                
Vagrant::Config.run do |config|
  config.vm.box = "CentOS-6.4-x86_64"   
  config.vm.network :bridged
end

# boot up
$ vagrant up

# connect 
$ vagrant ssh