I might be a little confused as to what your asking, but if you just want to configure the second NIC to talk to a home LAN for instance, all you have to do is from the prompt as root:
/sbin/ifconfig xxx.xxx.xxx.xxx up (where the xxx is the IP, probably 192.168.0.1 if I'm guessing right)
If you want this configure on startup, there's a million ways to do this, but its probably best to configure it the way your distro wants you to. Which distro are you using?
Cheers,
Finegan
|