mac にcentos7のvagrantいれる

% brew cask search vagrant virtualbox
% mkdir -p vagrant/test-centos7.0
% cd vagrant/test-centos7.0
% vagrant box add chef/centos-7.0
% vagrant init  chef/centos-7.0
% vagrant ssh

see.
http://docs.vagrantup.com/v2/getting-started/boxes.html