linux亮度调节程序 linux调节屏幕亮度

新建三个文本文件并给予执行权限：

up.sh

if [ ! -w /sys/class/backlight/intel_backlight/brightness ];then

echo "password" | sudo -S chmod 777 /sys/class/backlight/intel_backlight/brightness

fi

read bright < '/sys/class/backlight/intel_backlight/brightness'

v=600

v=$((4882 / 20 + $bright))

if [ $v -gt 4882 ]; then

v=4882

fi

echo $v | tee /sys/class/backlight/intel_backlight/brightness

down.sh

if [ ! -w /sys/class/backlight/intel_backlight/brightness ];then

echo "password" | sudo -S chmod 777 /sys/class/backlight/intel_backlight/brightness

fi

read bright < '/sys/class/backlight/intel_backlight/brightness'

v=600

v=$(($bright - 4882 / 9 ))

echo $v | tee /sys/class/backlight/intel_backlight/brightness

middle.sh Linux学习，http:// .cn

echo 2441 > /sys/class/backlight/intel_backlight/brightness

使用方法： 提高亮度： sudo ./up.sh 降低亮度： sudo ./down.sh 直接调节亮度到50%： sudo ./middle.sh