1.1 About OPatch

OPatch is a Java-based utility that runs on all supported operating systems and requires installation of the Oracle Universal Installer. It is used to apply patches to Oracle software.

The following topics provide more information about OPatch for Oracle Fusion Middleware:

• Type of Patches Used with OPatch
  Oracle provides several types of patches that you can use to patch your Oracle software with OPatch.
• Information for Oracle WebLogic Server Smart Update Users
  Smart Update is a standalone Java application that you use to upgrade the software installations quickly and easily with maintenance patches and maintenance packs. For Oracle Fusion Middleware 12c, Smart Update is no longer supported.