Check the Software Requirements
Installation
Create the Required Directories
Create Required UNIX Groups and User
The oinstall and dba groups were created. The user oracle was created and added to oinstall as the primary group and to dba as a secondary group.
NoteThese operations were
done using the Users and Groups application rather
than the command-line tools groupadd, useradd, and usermod because the
latter returned puzzling results.