Check that all the package dependencies are installed

Operate on the Arch Linux package database.
Modify certain attributes of the installed packages.
More information: <https://man.archlinux.org/man/pacman.8>.
Trick copyright: tl;dr; <https://github.com/tldr-pages/tldr>

pacman --database --check

click the source code to copy install pacman --database on any operating system with command-not-found.com