# pacman --database > Operate on the Arch Linux package database. > Modify certain attributes of the installed packages. > See also: `pacman`. > More information: . - Mark a package as implicitly installed: `sudo pacman --database --asdeps {{package}}` - Mark a package as explicitly installed: `sudo pacman --database --asexplicit {{package}}` - Check that all the package dependencies are installed: `pacman --database --check` - Check the repositories to ensure all specified dependencies are available: `pacman --database --check --check` - Display only error messages: `pacman --database --check --quiet` - Display help: `pacman --database --help`