Shell script to adjust screen brightness from the command line, mainly intended for use with shortcut keys.
Designed for use on Pop!_OS (Ubuntu), but it should work in any environment that has xrandr. Automated default key binding setup requires Gnome. If you'd prefer different key bindings or are using a non-Gnome environment, you'll need to configure key bindings manually. Or you can just use the command line if you prefer.
Open a terminal and paste the following command:
bash -c 'curl -o ~/.local/bin/brightness https://raw.githubusercontent.com/cfc23/brightness-cli/main/brightness && chmod +x ~/.local/bin/brightness'
This will download and install brightness in ~/.local/bin/ and mark it as executable. You can put it somewhere else if you want, but this location is a good default that should be in PATH on most systems, allowing brightness to work as a global command.
If you're using Gnome and you'd like the default key bindings (see below) to be automatically configured, type:
brightness bindkeys
brightness [up|down|reset|bindkeys|<float>]
up : Increase brightness by 0.1
down : Decrease brightness by 0.1
reset : Reset brightness to default
bindkeys : Set up default key bindings for Gnome (Alt+PageUp for up, Alt+PageDown for down, Alt+Home for reset)
<float> : Set brightness to the specified value (e.g., 0.5)