- ORACLE_HOME - This is the Oracle home location.
- OPATCH_DEBUG - This is the log level that specifies the amount of logging OPatch should perform.
- OPATCH_PLATFORM_ID - This is the unique platform ID.
- PATH - This is the path information.
- OPatch.SKIP_VERIFY_PLATFORM - Allows us to skip verification phase. Using this will not restore Oracle Home if patching fails at verification phase.