lux

lux(1) is a basic command-line utility to query and modify display brightness. Documentation regarding usage is contained within the lux(1) manual page.

Installation

If you're on an arch-based Linux distribution, then you can install lux from the aur:

paru -S clux      # The lastest stable release
paru -S clux-git  # The most up-to-date release

Otherwise if you would like to build from source, simply run:

git clone git://git.thomasvoss.com/lux.git
cd lux
make
make install