After installing the product or after installing maintenance packages, you can use the installation verification utility (IVU) to compute checksums of the installed file set to verify the checksum against the checksum in the product bill of materials.
Installing the product also installs the IVU, which is the installver command-line tool.
This topic describes using the installver command to compute a checksum on the installed files and compare the checksum to the product bill of materials.
You can also use the IVU to compute a new checksum for a system after you make significant configuration changes. The installver tool computes a new baseline checksum for each file in the inventory of a configured system to use to identify file changes in the later comparisons. Such a comparison is useful for detecting file tampering on the configured system, for example.
You can use the new checksums
to compare installations on multiple systems. The following graphic
illustrates the main use-cases where you can perform product verification
at any point of the product life-cycle or use the inventory file,
which is part of the baseline checksum feature, to provide full-file
verification of a configured system.
Although the most common use of the tool is to compare the product bill of materials to the installed file set after installation or after installing maintenance, other tasks are also possible.
When you are satisfied that your installed or updated file set matches the product bill of materials, you are finished installing and verifying the product or updating and verifying the product.
The IVU performs the tasks using the logic described in
the following graphic:
After verifying your installation, you can create profiles or deploy an application on an existing application server profile.
After installing, updating, and verifying, the next step is to use the product. Start the application server. to use the administrative console to deploy an existing application. See Fast paths for WebSphere Application Server for more information.
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