Raspberry Pi model 2 B, B+ and A+ onboard LED control

led.sh

#!/bin/bash
# Raspberry Pi model 2 B, B+ and A+ onboard LED control.
#
#  <led>:
#   led0 = ACT = Green 
#   led1 = PWR = Red 
#
#  Turn leds on (1) or off (0):
#    echo 1 | sudo tee /sys/class/leds/<led>/brightness
#    echo 0 | sudo tee /sys/class/leds/<led>/brightness
#
#  Triggers:
#   - <option>:
#     [none] mmc0 timer oneshot heartbeat backlight gpio cpu0 cpu1 cpu2 cpu3 default-on input rfkill0 rfkill1 phy0rx phy0tx phy0assoc phy0radio
#   - defaults:
#     led0 = mmc0
#     led1 = input
#   -cmd:
#     echo <option> | sudo tee /sys/class/leds/<led>/trigger
#

#Disable for good the ACT LED.
  dtparam=act_led_trigger=none
  dtparam=act_led_activelow=off

#Disable for good the PWR LED.
  dtparam=pwr_led_trigger=none
  dtparam=pwr_led_activelow=off
  
  
#-------------------------------
#The Pi Zero's values are opposite, 
# and it only has one LED, led0 (labeled 'ACT' on the board). The LED defaults to on (brightness 0), and turns off (brightness 1) to indicate disk activity.
#
#If you want to turn off the LED on the Pi Zero completely, run the following two commands:
#
# Set the Pi Zero ACT LED trigger to 'none'.
echo none | sudo tee /sys/class/leds/led0/trigger

# Turn off the Pi Zero ACT LED.
echo 1 | sudo tee /sys/class/leds/led0/brightness

#To make these settings permanent, add the following lines to your Pi's /boot/config.txt file and reboot:
# Disable the ACT LED on the Pi Zero.
dtparam=act_led_trigger=none
dtparam=act_led_activelow=on