Open a terminal
Update package databases with `sudo pacman -Syu`
Search for the library with `pacman -Ss
Install the library with `sudo pacman -S
Install multiple libraries with `sudo pacman -S
Remove a library with `sudo pacman -R
Remove a library and unused dependencies with `sudo pacman -Rns
List installed packages with `pacman -Q`
Check whether a package is installed with `pacman -Q