Create an OSOPER group only if you want to identify a group of operating system users with a limited set of database administrative privileges (SYSOPER operator privileges).
If an OSOPER group does not exist; for example, if this is the first installation of Oracle Database software on the system
If an OSOPER group exists, but you want to give a different group of operating system users database operator privileges in a new Oracle installation
operunless a group with that name already exists. For example:
# groupadd -g 54323 oper