bash

#!/bin/bash

# Written by Dalton Miller and Philip Robb

echo "Welcome to the Asus G75 Linux Backlight Script"
if [ 'whoami' = root ]; then
        echo Please rerun the script using superuser permissions
		exit
fi

function readNum {
        echo "Lets adjust that brightness on your Nvidia backlight"
        echo "What value would you like to have your backlight set on?"
        read bklght
}

until [[ $bklght -gt 1 && $bklght -lt 100 ]]; do
        echo ""
        echo "Hmmm that doesn't see to be valid value"
        echo "You inputed $bklght"
        echo "Lets try this again between 1-100 idiot"
        echo ""
        readNum
done

modprobe nvidiabl
echo $bklght | tee -a /sys/class/backlight/nvidia_backlight/brightness
echo "Your backlight is set to $bklght"

exit