You should be aware that OPatch is tool sensitive to the version. You cannot use the OPatch tool from one release to patch another release. Oracle 11g introduced several new options. The next three images show the OPatch syntax in 11g, how it changed from the 10g release, and which options were added in this release.

Here you can see from the syntax summary that there were many more options added, and in the next two images, the syntax of the new options is shown. The util commands are depicted in the next image. The commands available are used to apply SQL commands, clean up the backup, perform file copies, restore an Oracle Home, or perform other remove or rollback actions.

In the next image the detailed options of the prereq command are shown. The prereq command listed is used to check the central inventory, look for conflicting patches, verify the Oracle home, OUI, and Oracle installer locations, among other checking operations. These options are particularly useful...