Authorization

Users authorized to perform special functions are defined as having appropriate privileges, and they are called superusers. Appropriate privileges also belong to users with:

A user ID of zero
RACF-supported user privileges trusted and privileged, regardless of their user ID

A user can switch to superuser authority (with an effective UID of 0) if the user is permitted to the BPX.SUPERUSER FACILITY class profile within RACF®. Either the ISPF Shell or the su shell command can be used to switch to superuser authority.

This document assumes that your operating system contains Resource Access Control Facility (RACF). You could use an equivalent security product updated to handle z/OS UNIX security.