Upgrading a Package
You can use RPM to upgrade a package on your system, to get a later release of the package, or to get a newer version of software on your system. Upgrading a package is logically the same as removing the currently installed package and installing a new one. However, using the upgrade feature makes these steps a single operation. This enables you to avoid dependency and other file conflict problems that might arise if you perform the steps separately. Use the -U (uppercase U) option with rpm to upgrade a package on your system. For example, if you had already installed perl-5.00503 on your system and wanted to upgrade to perl-5.6.0, you would download the new perl package and upgrade using the following as root:
# rpm -U perl-5.6.0-1.i386.rpm ...
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