#!/bin/bash LED3_PATH=/sys/class/leds/beaglebone:green:usr3 function removeTrigger { echo "none" >> "$LED3_PATH/trigger" } echo "The LED3 user is starting" if [ "$1" == "on" ]; then removeTrigger echo "1" >> "$LED3_PATH/brightness" elif [ "$1" == "off" ]; then removeTrigger echo "0" >> "$LED3_PATH/brightness" elif [ "$1" == "blink" ]; then removeTrigger echo "1" >> "$LED3_PATH/brightness" sleep 0.5 echo "0" >> "$LED3_PATH/brightness" sleep 0.5 fi echo "Done"