Per the following document, the supported RHEL/OL versions are 6 update 1 and higher (6.1 to 6.8+).
Oracle E-Business Suite Installation and Upgrade Notes Release 12 (12.2) for Linux x86-64 (Doc ID 1330701.1)
Thank you so much for prompt response, .
I checked in this document and found that for EBS R12.2.0 or EBS R12.2.5, RHEL server version must be 6.1 or higher not 6.0. I am working on it and I hope it will complete successfully.