Agent Installation and Configuration > Windchill RV&S Agent Security > Setting Up UNIX Security Realm
  
Setting Up UNIX Security Realm
The UNIX security realm is supported for SuSE Linux and Red Hat Linux.
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When setting up the UNIX security realm, you must specify all the users for primary and secondary groups in the Linux groups file. You cannot rely on the primary group ID for the user.
To install the UNIX security realm