How to install latest Opatch utility?
Download the latest Opatch utility from Patch 6880880
Take a backup of older version of OPatch utility under $ORACLE_HOME and unzip the downloaded file
mv OPatch OPatch.bkp
Now check the OPatch version, which will be latest installed by now
1. Oracle E-Business Suite Release 12.2
2. Oracle Linux x86-64 Operating System