[expert] How to update linux without a GUI in 8.2 and 9.0

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Helo. I have a couple of firewalls, one running 8.2 and another running 9.0. I don't run X on my firewalls, so I was wondering if there was a way to use 8.2 and 9.0 update features from the command line? I know how to add update locations using the "urpmi" type commands, but I can't figure out if there's an easy way to get updates for installed packages like through the gui. Any help would be greately appreciated.

Thanks,
Cory

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