Chapter 6. User Management

This one can log in, this other can get email; never give out root.

While computer intrusions over the Internet make headlines, a system administrator’s greatest security threats often come from a system’s own users. Maybe they won’t ship your data to a crime syndicate, but disgruntled and incompetent users will crash your servers given the chance—sometimes out of malice, but more often out of ignorance. Think about security as the combination of confidentiality, integrity, and availability, and it will immediately become clear how users with unrestricted system access can damage security.

Despite what you ...

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