How to control the brightness in the RHEL7 and CentOS7 on CF-53

I am using the Panasonic CF-53 and installed the RHEL7. But I can not control the brightness by Fn+F1/F2. My solution for this problem is listed

sudo su // log in to superuser
echo 400 > /sys/class/backlight/intel_backlight/brightness // change the parameters as you need