Linux Cara Kontrol Brightness Monitor Via Command Line

namapc@namapc-baru:~$ sudo xrandr | grep " connected" | cut -f1 -d " "
[sudo] password for namapc:
LVDS-1
namapc@namapc-baru:~$ sudo xrandr --output LVDS-1 --brightness 0.5
namapc@namapc-baru:~$ sudo xrandr --output LVDS-1 --brightness 0.7
namapc@namapc-baru:~$ sudo xrandr --output LVDS-1 --brightness 0.8
namapc@namapc-baru:~$ sudo xrandr --output LVDS-1 --brightness 0.85
namapc@namapc-baru:~$ sudo xrandr --output LVDS-1 --brightness 1