Brightness is a small bash script I wrote to change the brightness of all connected monitors.
brightness up
or
brightness down
xrandr and bc For arch based systems:
sudo pacman -S xorg-xrandr bc
For debian/ubuntu based systems:
sudo apt-get install x11-xserver-utils bc
git clone https://github.com/its-Lyn/brightness.git
cd brightness
chmod +x brightness
./brightness