I am trying to install the drivers for my Nvidia Geforce GT 430 graphics card, but I keep having problems. I run the .run file in terminal with the sudo command, and I get this error: Code: ERROR: You appear to be running an X server; please exit X before installing. For further details, please see the section INSTALLING THE NVIDIA DRIVER in the README available on the Linux driver download page at www.nvidia.com. And then this error: Code: ERROR: Installation has failed. Please see the file '/var/log/nvidia-installer.log' for details. You may find suggestions on fixing installation problems in the README available on the Linux driver download page at www.nvidia.com. I'm not sure what's wrong. I don't know what it means by X server.