如何檢視Oracle補丁 - opatch 的使用

pldfmsqcdb$opatch
Invoking OPatch 10.2.0.4.2

Oracle Interim Patch Installer version 10.2.0.4.2
Copyright (c) 2007, Oracle Corporation.  All rights reserved.

Syntax Error... No command specified.

 Usage: opatch [ -help ] [ -r[eport] ] [ command ]

            command := apply
                       lsinventory
                       napply
                       nrollback
                       rollback
                       query
                       version
                       prereq
                       util

  := -help       Displays the help message for the command.
                       -report     Print the actions without executing.

 example:
   'opatch -help'
   'opatch apply -help'
   'opatch lsinventory -help'
   'opatch napply -help'
   'opatch nrollback -help'
   'opatch rollback -help'
   'opatch prereq -help'
   'opatch util -help'
  

OPatch failed with error code 14
pldfmsqcdb$