The driver for that card is available from realtek at the following link:
This is kernel 2.6.32, it will be a stable release. The rest to the numbers are put there by Centos. The driver from the official site will run with this kernel. See the README file in the archive
for details on how to install the driver, ( it is source and has to be compiled ). Pay attention to your kernel version, there are different instructions based on the level of kernel you have.
You can also check to see if Centos has supplied a driver already compiled. That is much easier than compiling your own kernel.
I'm confused on what drivers I should try to download according to my kernel.
Look on the RealTek site in the description field, it tells you what driver is correct for which kernel. If you use one Centos has compiled, they will selected the correct one. No need to sweat it.
I don't know the exact name Centos would call the driver, it should be close to
with an extension of .ko
Have you done a 'lsmod | grep rtl819' in a konsole to see if the driver is loaded? If not, try that first, before you go off downloading and compiling.
Also, search your system to see if the driver is in the drivers directory for your kernel.
Open a konsole, run the command as root 'updatedb' let this run, it will take a few minutes if you have never used the command.
Next do a 'locate rtl819x*' and see if you already have the driver. I'm assuming here it doesn't show up in the lsmod. If you find the driver, run the command 'modprobe rtl819x' to see if it will load. You have to have the exact name of the driver from the locate command. If it loads, configure it, and see if it works.
Hope this helps.