Opatch FAQs and Tips
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[This guide is inteded to provide a brief overview of the OPatch utility and you should always refer to the official documentation released by oracle corporation for latest information]
OPatch is a java based utility that allow the application and rolling back of interim patches to an Oracle product. The program has sub-commands that
may take arguments. The program requires Java(JVM) to be present on the current system.OPatch expects users to have commands such as fuser, jar, ar and make on
Unix platforms and jar on Windows platforms to be available in their PATH.
Help : $ORACLE_HOME/OPatch/docs/Users_Guide.txt