Finally, i was able to locate the problem.

$ chmod 7555 $ORACLE_HOME/bin/oracle

I was missing 7555 to the oracle executable in the bin direcotry.

Now, I have figured out a fastest way to migrate the entire ORACLE folder
and start it up on a different machine thus, avoiding to use Intsaller and create
database etc.... Of course, it would work as long as the OS is identical.

Thanks everyone for all your help.