Controls the keyboard backlight on Linux
Options:
-m
Maximum, set to 100%
-o
Off, set to 0%
-s <level>
Set the level to <level> - must be between 0 and maximum
-u <increment>
Increment the level by <increment> - must be between 0 and maximum
-d
Decrement the level by <increment> - must be between 0 and maximum
This is hardcoded to use /sys/class/leds/kbd_backlight/brightness. If
your system does not use this file for backlight control, then this
program isn't for you.