box追加
$ vagrant box add centos72 <box URL *1>
*1 https://github.com/CommanderK5/packer-centos-template/releases/download/0.7.2/vagrant-centos-7.2.box
仮想マシン起動
$ cd ~
$ mkdir centos72
$ cd centos72
$ vagrant init centos72
$ vagrant up
ログイン
$ vagrant ssh