RedHat eh? What version?
If it is more recent (like 7.3 or 8.0 or 8.0.93) it should be as simple as opening up a terminal and typing :
Please note the minus, it is important. That gets you to a root login, and reads all of the root's login configuration files. Without the minus some small grief will popup later on.
Now first type :
That will run the harware detection tool. If that doesnt have a screen popup that asks to configure the NIC, then we have a bit of work. Before going the "hard" route (hacking a few files and rerunning kudzu) lets try this.
Apparently kudzu isnt seeing any new or unconfigured hardware. So what we need to do is this : If you are using RedHat 8 or later, there is a really handy graphical log viewer. Found in Gnome2 at Applications -> System Tools -> System Logs.
Run that, pick "System Log" from the list, and scroll allllll the way down. If you are like me, and rarely boot, it shouldnt be that long, else -- LONG ;D Anyway, what I need is for you to scroll from the bottom towards the top scanning for the network card to be seen.
Here is a copy of my last syslog session which references my NIC (the full message is wayy to big for in here (this info can also can be found in the file /var/log/messages) :
Note the IRQ 11 shit. That can be a clue as to what driver your system is trying to use, just from looking at that system log file. Now if you see nothing, I want you to take a look at the output of the following command from the terminal that you (hopfully) kept open from the "su -" command. Type:
Jan 31 15:09:26 leinenkugel kernel: tulip0: MII transceiver #1 config 3100 status 7829 advertising 01e1.
Jan 31 15:09:26 leinenkugel kernel: eth0: Lite-On 82c168 PNIC rev 32 at 0xe08bd000, 00:A0:CC:28:A0:F9, IRQ 11.
Jan 31 15:09:26 leinenkugel kernel: eth0: Setting full-duplex based on MII#1 link partner capability of 41e1.
And list what you see there. That is all of your modules (or drivers) that are loaded.
Please post that info. Chances are that you have an odd NIC, that the modules are not getting loaded for it. If you have an exact part number (like a kingston 2122) I can find out what module to use reallly quickly for ya.