echo 255 > /sys/devices/platform/backlight/backlight/backlight/brightness//调整屏幕亮度cat /sys/devices/platform/backlight/backlight/backlight/brightness//查看屏幕亮度echo 4 > /sys/class/graphics/fb0/blank//息屏echo 0 > /sys/class/graphics/fb0/blank//亮屏//待机echo "mem" > /sys/power/stateecho "disk" > /sys/power/state //休眠echo "platform" > /sys/power/diskecho "shutdown" > /sys/power/disk//关机poweroff -f
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