This package creates the user and the groups for Oracle, sets the
Oracle environment variables, sets kernel parameters to values
recommended by Oracle, and provides for automated start and stop of
Oracle components at system start and stop time. It also includes
dependencies for other software packages needed to install and use
Oracle, so that when you select this package the other packages are
included automatically (when you install via YaST2) or that you are at
least reminded to install them (when installing via the rpm command).
This package is not required for running Oracle but it simplifies
things significantly.

You can edit all settings via YaST2.

http://www.novell.com/oracle/