Fedora™ Unleashed, 2008 edition

rpm-i	Install a package Useful options to -i:
	--excludedocs: Does not install documentation to save space
	--replacepkgs: Replaces the package with a new copy of itself
	--force: The 'big hammer' — Ignores all warnings and installs anyway
	--noscripts: Does not execute any pre- or post-install scripts
	--nodeps: Ignores any dependencies
	--root path: Sets an alternative root to path
rpm -e	Erase (deletes) a package. Useful option to -e:
	--nodeps: Ignores any dependencies
rpm -U	Upgrade a package, removing the older one but keeping modified files, such as configurations. Useful options to -U:
	--oldpackage: Permits downgrading to an older version
	Other options are the same as with rpm -i
rpm -q	Query about package information. Useful options to -q:
	-p file: Displays all information about the package file
	-f file: Asks what package owns the file file?
	--whatprovides x: Determines what packages provide x
	--whatrequires x: Determines what packages require x
	-i: Summarizes the package information
	-l: Lists the files in package
	--scripts: Displays the contents of any install, uninstall, or verifies scripts
	--provides: Displays the capabilities package provides
	--requires: Displays the capabilities package requires
rpm -V	Verify packages against the RPM database .Useful options to - V:
	-a: Verifies all installed packages
rpm -K	Use GPG to verify a downloaded package Useful options to - K:
	--nosignature: If you lack public GPG encryption keys, do not have GPG installed, or are legally prohibited from using GPG, this still verifies the package using size and MD5 checksums.