Before running these Ansible playbooks, or any Ansible commands for that matter, it is essential that you have your publick SSH keys copied to your server's `~/.ssh/authorized_keys` file. The following command will copy your public key from your management computer, to the server:
# Don't space out and forget to ensure that you replace the username and ip/host address with your specific credentials.
Then all you have to do, as long as you have properly installed Ansible, and have added it's location to your $PATH, is run the following command to confirm that everything is hunky-dory:
$ ansible all -m ping
That should tell you whether Ansible has the ability to contact, and SSH into, the servers that you've added to your Ansible hosts file in `/etc/ansible/hosts`
