How to install latest Opatch utility?
Step 1
Download the latest Opatch utility from Patch 6880880
Step 2
Take a backup of older version of OPatch utility under $ORACLE_HOME and unzip the downloaded file
cd $ORACLE_HOME
mv OPatch OPatch.bkp
unzip /p6880880__.zip
Step 3
Now check the OPatch version, which will be latest installed by now
cd OPatch
./opatch version
Environment
1. Oracle E-Business Suite Release 12.2
2. Oracle Linux x86-64 Operating System