from http://www.rpm.org/RPM-HOWTO/rpm-do.html

RPM is a very useful tool and, as you can see, has several options. The best way to make sense of them is to look at some examples. I covered simple install/uninstall above, so here are some more examples:

*

Let's say you delete some files by accident, but you aren't sure what you deleted. If you want to verify your entire system and see what might be missing, you would do:

rpm -Va