Before applying patches, you might want to know more information about patches that have been previously applied.
The following commands provide useful information about patches that are already applied to a system:
patchadd -p or showrev -p
Shows all patches that have been applied to the system.
pkgparam pkgid PATCHLIST
Shows all patches that have been applied to the package identified by pkgid, for example, SUNWadmap.
patchadd -S service -p
Shows all the /usr patches that have been applied to an OS server.
Use one of the following patchadd command lines to display information about patches that have been applied to your system.
To obtain information about all patches that have been applied to your system, type:
$ patchadd -p
To verify whether a particular patch has been applied to your system, type, for example:
$ patchadd -p | grep 111879