ifconfig eth0
 

so i'm somewhat new to the world of linux, so any help would be appreciated. so recently my roomate set up a router so where can have the net in both of our rooms. i have a dual boot on my computer, one being windows and other is rehat linux 9. when i start redhat i can go into the termial and do an ifconfig eth0 and it says that no device found. so i t ry to set it up using the network config but i can't find my nic card in there. also when i do an ifconfig i get a local address with an ip of 127.0.0.1, and a subnet of 255.0.0.0. dhcp is up and running along with dns. but before the router was being used i would bring the cable modem into my room whenever i needed to use the net, and it would work just fine. also, when i do use windows i can get on the internet just fine. i have no idea what is going on. can u help me??

If 'ifconfig' only shows the loopback device (lo, 127.0.0.1) and nothing else, then it probably means the driver (module) for your nic isn't loaded. Try doing a search on www.google.com/linux for the model of your nic card, one of the pages will probably mention the module name (like tulip or ne2000 or something). If you find the module name for your card, do 'modprobe module_name'. with, you know, module_name being tulip or something. If you don't get any errors, try ifconfig again, hopefully eth0 will have shown up.