https://www.bmc.com/education/courses/bmc-mainframe-racf-security-in-a-unix-system-services-environment.html
BMC helps customers run and reinvent their businesses with open, scalable, and modular solutions to complex IT problems.
unix system servicesin abmcmainframeracf
https://www.ibm.com/docs/en/db2-for-zos/13.0.0?topic=options-choosing-class-name-root-suffix
The system programmer can alter the default naming conventions for the resource classes and profiles that protect Db2 objects and administrative authorities.
the classracfchoosingnameroot
https://www.ibm.com/docs/en/db2-for-zos/13.0.0?topic=profiles-implicit-privileges-ownership
When a user is the owner of a Db2 object, that user might have some implicit privileges, but not all privileges associated with the object.
racfimplicitprivilegesownership