Tools and guides for doing software development, data analytics, online privacy, and other things.
From ubuntuforums.org
Edit /sys/class/backlight/intel_backlight/brightness:
sudo nano /sys/class/backlight/intel_backlight/brightness
I think 1 is the lowest visible setting. You could try 0, but it might turn your screen completely off and then I don’t know how you’d get it back.