Last updated on October 11, 2018
First, find the corresponding directory of this LED device in
/sys/class/leds, such as
/sys/class/leds/device_name, and switch your working directory to this directory. The
device_name may be similar to the device driver of your wifi adapter. You should have a file named
trigger and a file named
brightness in this directory.
cat trigger shows you available triggers to trigger the LED light, with the current trigger surrounded by brackets. Different triggers will turn on and off the LED in different cases. Use
echo new-trigger > trigger to change trigger.
cat brightness shows the current brightness of the LED. Use
echo N > brightness to change brightness, where N is an integer.