You can use RACF® commands to perform security tasks. RACF commands enable you to find out how you are defined to RACF, how to protect your resources, how to change another user's access to your resources, and how to change the way RACF defines you. You can enter RACF commands directly in the foreground during a TSO command terminal session.

This book shows examples of RACF commands in uppercase letters. When you enter these commands from a terminal or workstation, you can use uppercase letters, lowercase letters, or both.