Creating the OSDGDBA Group for Database Installations
You must designate a group as the OSDGDBA group during installation. Members of this group are granted the SYSDG privileges to perform Data Guard operations.
Create the OSDGDBA group using the group name dgdba,
unless a group with that name already exists:
# /usr/sbin/groupadd -g 54325 dgdba
Parent topic: Creating Operating System Privileges Groups