Applying a service update

When installing a service update, it can be left in the applied state.

In this state, the former version of that software product is saved in the /usr/lpp/PackageName directory. Service Updates in the applied state allow you to restore the former version of the software without having to reinstall it.

Only service updates can be placed in the applied state. In contrast, after you install an entire software product, the product is left in the committed state. Software products in the committed state do not save the previous version of the software, because two versions of the same software product cannot be installed at the same time.

Applying a service update using SMIT:
Type smit update_by_fix on the command line.
Applying a service update from the command line:
Use the installp -a command to only apply the update.