Pi LED lights off

How To switch off the LED of a Pi

Sources:
https://kofler.info/on-board-leds-des-raspberry-pi-steuern/
https://www.jeffgeerling.com/blogs/jeff-geerling/controlling-pwr-act-leds-raspberry-pi
https://raspberrypi.stackexchange.com/questions/70593/turning-off-leds-on-raspberry-pi-3

HowTo

Red LED = led0
Green LED = led1

1. Overwrite standard settings
   sudo sh -c 'echo none > /sys/class/leds/led0/trigger'
sudo sh -c 'echo none > /sys/class/leds/led1/trigger'

2. switching off Red powerd LED (on PI2 & 3)
   sudo sh -c 'echo 0 > /sys/class/leds/led1/brightness'