Protected user IDs

You can define protected user IDs for started procedures associated with z/OS UNIX, such as the kernel, the initialization started procedure, and important daemons that are critical to the availability of your z/OS UNIX system. This prevents these user IDs from being revoked through inadvertent or malicious incorrect passwords and password phrases, or from being used for other purposes, such as logging on to the system. For more information, see Defining protected user IDs.