I mention Ansible and other tools in the article. The idea, as others have mentioned, is to teach a man to fish. You're much better off with having an automated way to perform this, but you shouldn't ever run anything automated that you don't understand.
We'll release an Ansible Playbook over the next week or so that follows these steps.
Ideally the server comes up and applies chef, doing the needful to secure it. Hand-cooking a server is extremely painful.