As an z/OS UNIX user, you can control the read, write, and execute access to your files by other users in and outside of your group by setting the permission bits associated with the files.

To access z/OS UNIX files from the NFS, you must be defined as an z/OS UNIX user. The system programmer defines you as a z/OS UNIX user by assigning a z/OS UNIX user ID (UID) and a z/OS UNIX group ID (GID) to you. The UID and GID are numeric values associated with a TSO/E user ID. The values are set in the RACF user profile and group profile when you are authorized to use z/OS UNIX. The system uses the UID and GID to identify the files that you can access. Your specific UID value identifies you as a user of z/OS UNIX services. A GID value is a unique number assigned to a group of related users. These numbers appear in the RACF user profile. See z/OS UNIX System Services Planning for more information.