Libobk.so shows no such file or directory Oracle 11g

User_OPD8R

Hello

I am trying to recover my standby database from a failure and when i tried to execute the commands in RMAN i get this message:

ORA-27211:Failed to load Media Management Library.

I went to the Oracle_home directory  /u02/app/oracle/product/11.2.0/dbhome_1/lib/ to check the libobk.so file and it is there with the error 'no such file or directory.

I went to /usr/lib/ to check if the libobk.so file is there and looks like is missing.

How can i re-install this media management lib or recover it?

I have tried with this command:

ln -s /usr/lib/libobk.so /u02/app/oracle/product/11.2.0/dbhome_1/lib/libobk.so

But it just created the lib file in Oracle_home path but not in /use/lib path

Please help...

Thanks

Dario