What patches are installed within an Oracle Home?
DBA’s often do not document the patches they install. This may lead to situations where a feature works on machine X, but not on machine Y. This FAQ will show how you can list and compare the patches installed within your Oracle Homes. All patches that are installed with Oracle’s OPatch Utility (Oracle’s Interim Patch Installer) can be listed by invoking the opatch command with the lsinventory option.