Script to turn keyboard led on

How-To-Turn-Keyboard-Led-On.md

Create a udev rule on /etc/udev/rules.d/99-scrolllock.rules with this content:

SUBSYSTEM=="leds", KERNEL=="input*::scrolllock", RUN+="/bin/chmod 777 /sys/class/leds/%k/brightness"

After, create a file on .local/bin/led (or other directory for your scripts), and put this content:

#!/bin/bash

LED_PATH="/sys/class/leds/input*::scrolllock/brightness"

case "$1" in
	on)
		echo 1 | tee $LED_PATH
		;;
	off)
		echo 0 | tee $LED_PATH
		;;
	toggle)
		current=$(cat $LED_PATH | head -n 1)

		if [[ "$current" == 0 ]]; then
			echo 1 | tee $LED_PATH
		else
			echo 0 | tee $LED_PATH
		fi
		;;
	*)
		echo "Arguments: on | off | toggle | sl_status"
		exit 1
		;;
esac

Good job, now I recommend to reboot your system so you can turn your led on with these commands:

led on
led off
led toggle

I hope this helped :)