You need to set a password for 'root', the system administrative account. A malicious or unqualified user with root access can have disastrous results, so you should take care to choose a root password that is not easy to guess. It should not be a word found in dictionaries, or a word that could be easily associated with you.
Tesriḍ ad tesbaduḍ awal n uɛeddi i "uẓar", amiḍan n unedbal n unagraw. Yir aseqdac neɣ win aseqdac ur nessin ara s unekcum aẓar ad d-yeglu s wuguren meqqren, ɣef waya ilaq ad textireḍ s leɛqel-ik·im awal n uɛeddi ara yiwɛiren i tifin. Ur ilaq ara ad yili d awal i yellan deg yimawalen neɣ d awal yesɛan srid assaɣ yid-k·m.