Hi Srihari,
As part of this, i have installed Oracle 11.2. Now to run the dbua.sh script, i cant find the directory 'sap' under /oracle/SID/11203 where, it should be. Currently am stuck and can't proceed further.
Please confirm you have installed Oracle using ./RUNINSTALLER and there are no errors during installation.
Secondly look into folder /oracle/SID/112_64 which should be home directory for target version.
You should get sap folder under this.
Regards,
Deepak Kori