Raspberry Pi provides two LED lights – a green and red one. If anything goes wrong you can identify most of the problems by their status – blinking, always turned on etc. My Pi is working perfectly, so I’ve decided to rid myself of these two bright lights. It might even lower the power consumption a little bit. Anyway, the process is really simple. Type in sudo crontab -e and start editing the cron. You need to paste in the following:
@reboot echo 0 >/sys/class/leds/led0/brightness
@reboot echo 0 >/sys/class/leds/led1/brightness
Save changes and reboot in order to try out the new additions. These two commands are run after the Pi boots up, after each restart. The names led0 and led1 are the green and red LED. They still blink during boot, but power off completely when the system is up and running.