list all installed packages:
rpm -qa
show package info
rpm -qi <package>
the same but for an uninstalled packagefile
rpm -qpi <package.rpm>
list files in package
rpm -ql <package>
install package
rpm -ivh <package.rpm>
delete package
rpm -e <package>
Adding –test will do a dryrun and only check for (dependency) errors
list requirements for installing/using package
rpm -q <package> --requires