调节linux屏幕的亮度

查看当前backlight由什么控制:

一般都是intel.

ls /sys/class/backlight

查看当前的亮度:

cat /sys/class/backlight/intel_backlight/max_brightness

修改亮度:

echo 5000 | sudo tee /sys/class/backlight/intel_backlight/brightness