usr-local-bin-keyboard-backlight

#!/bin/bash
VALUE=$(cat /sys/class/leds/smc::kbd_backlight/brightness)
INCREMENT=32
TOTAL=unset

case $1 in
up)
    TOTAL=`expr $VALUE + $INCREMENT`
    ;;
down)
    TOTAL=`expr $VALUE - $INCREMENT`
    ;;
full)
    TOTAL=255
    ;;
off)
    TOTAL=0
    ;;
esac

if [ $TOTAL == unset ]; then
    echo "Please specify up, down, full, or off"
    exit 1
fi

if [ $TOTAL -gt 255 ]; then TOTAL=255; fi
if [ $TOTAL -lt 0 ]; then TOTAL=0; fi 
echo $TOTAL > /sys/class/leds/smc::kbd_backlight/brightness

#sudo visudo sergiogeek7 ALL=NOPASSWD:/usr/local/bin/keyboard-backlight up, /usr/local/bin/keyboard-backlight down
#Increase backlight keyboard: sudo keyboard-backlight up
#Decrease backlight keyboard: sudo keyboard-backlight down
#Increase to total value of keyboard backlight: sudo keyboard-backlight total
#Turn off backlight keyboard: sudo keyboard-backlight off