The listed targets need resolvable hostnames. If you do not have a DNS server
running, you can add entries to ``/etc/hosts``. You also need to be able to SSH
in to the listed targets without passphrases, and the remote user needs to have
-passphraseless `sudo` access. Note that the ssh keys at the end of the
+passwordless `sudo` access. Note that the ssh keys at the end of the
``targets`` entries are the public ssh keys for the hosts. On Ubuntu, these
are located at /etc/ssh/ssh_host_rsa_key.pub