I would like change the group of my user database

 hello,

         On my engine unix linux x86 red hat 5
          I have installed my database, version 10.2.0.5, with my owner, "ora10g, group oinstall".
          Afterwards i have installed and created my database with this owner.

all is correct but I have met a problem with my soft dataprotector with this owner then I have to change the group, from oinstall to group dba.

          therefore :

           1 - I have change the group name of my owner from oinstall to dba.

           2 - I have change the owner in my all file system by chown ora10g:dba *

           3 - I have change in my all file /etc/oraInst.log and inventory_loc=/applis/ora10g