The above card(realtek8139/810x family PCI fast Internet nic) is installed and works fine on my windowsxp system. I recently installed the red hat 9 on desktop on 2nd hard drive.
Linux is unable to detect it wheres i am able to configure my printer and scanner etc correctly after installation.
I find that some other card 3com is shown in the default window as installed. It may be due to some misunderstanding on my part while installing linux through Cd's that I got with a book by Michael jang.

network con-fig shows 3 drivers/adapters starting with realtek 8129 and then 8139.

While choosing any of the above the message comes 'Device eth0 does not seem to be present'
I am totally new and need help
thanks
lngmn7

Welcome to LQ.

Can you post the output from:
lspci
dmesg | grep eth
lsmod

i have the problem before.. but it already solved when I did this..

you have to be root to do this.

#cd usr/src/<your-linux-kernel-source directory>
#make xconfig

click Network device support
click Ethernet (10 or 100Mbit)
click 'yes' for all *RealTek RTL-8139*

then compile your kernel again

#make dep
#make bzImage

#cd ../arch/i386/boot

copy your bzImage file into /boot diretory and update
your grub/lilo setting.

all the best mike...

contiang..
That's got to be the hardest way of doing it..
RH9 ships with the drivers already built..

lngmn7..
Problem will be an incorrect driver loading and holding up the hardware.
Remove the installed cards and post the info david_ross listed..

Do these in a terminal as root user..