cat /sys/class/backlight/acpi_video0/max_brightness > /sys/class/backlight/acpi_video0/brightness
Источник: http://linuxg.net/change-the-brightness-via-command-line/
cat /sys/class/backlight/acpi_video0/max_brightness > /sys/class/backlight/acpi_video0/brightness
Источник: http://linuxg.net/change-the-brightness-via-command-line/