Command line control of ADMIN LED

Are you able to provide command line examples of how to control the ADMIN LED (e.g. via sysfs)?
Or another LED controllable from command line.

As long as you have GPIO LED support enabled (it is in all our images / packages):

# on
echo 1 > /sys/class/leds/ten64\:admin/brightness
# off
echo 0 > /sys/class/leds/ten64\:admin/brightness