I get a lot of questions about this, since its how one goes about installing software on Red Hat Linux (of course, one may also use scripts or compile source code manually, but RPM generates a lot of questions....)

Anyway, here is really comprehensive article on working with RPM, listing several one liners that prove useful....

http://www.linuxlaboratory.org/modu...le=article&sid=27&mode=thread&order=0&thold=0