sudo bash -c "cat >/etc/init.d/set_led_mode.sh" <<EOL
#!/bin/sh
# one of: none mmc0 timer heartbeat backlight gpio cpu0 cpu1 default-on
LED_MODE=none
TRIGGER=/sys/class/leds/green\:ph24\:led1/trigger
case "\$1" in
    start)
        echo \$LED_MODE > \$TRIGGER
        ;;
esac
exit 0
EOL
sudo chmod +x /etc/init.d/set_led_mode.sh
sudo update-rc.d set_led_mode.sh start 20 2 3 4 5 .