You must assign Oracle Inventory as the primary group and dba as the secondary group. Oracle requires secondary groups for identifying operating system accounts that have database administrative (SYSDBA) privileges and for those accounts that have limited sets of database administrative (SYSOPER) privileges. Create the groups on all systems and assign the Oracle user to these groups.

Before creating Oracle users and groups, see the Oracle documentation for information about creating the oinstall (Oracle inventory), dba group, and Oracle user.

Use one of the following ways to create the Oracle user and groups: