I recently installed Redhat 8.0. I downloaded the RPM files from Nvidia and followed the instructions. Now when I try to run X server(windows?) I get the error that

"(EE) NVIDIA(0): Failed to initialize the NVIDIA kernel module!"

Nvidia has a blurb about this in the troubleshooting section, but I didn't find it helpful. Could someone plz explain how I can fix this problem? Remember, you are speaking to someone with a childs understanding of Linux.

Did you install the correct package for your linux distro / version?
I had the same problem and this is what fixed it.

Download the nvidia_glx tar package form Nvidia website
untar it:

tar -zxvf nvidia_glx...tar.gz (can't remember the exact filename)

use the cd command to change to the nvidia_glx directory
compile install package:

make install

Check with the lsmod command to veify the nvidia module is being loaded.
If not the load the module:

modprobe nvidia

Did you modify the /etc/X11/XF86Config-4 file?

Try to start server

startx