If they aren't PNP you have to manually tell Linux to load the NE2000 (or whatever) drivers to so and so an address... and if they are PNP you might still have to tell it to load the drivers and detect. You will get people telling you how, but unless it's easier then back when I did this with Redhat 6.0, you might be best off looking for How-To's at redhat.com, linux.org, or linuxdoc.org.