RPM is the Red Hat Package Manager. The RPM system is used to manipulate individual software packages. These packages, called RPMs, can be installed, uninstalled, queried and verified. This document will introduce you to the most basic (and most frequently used) RPM commands.
Releases 2.0 and 2.1 of Red Hat Linux were shipped with RPM version 1.X. By the time you read this, RPM 2.0 should be released with many new features and improvements.