Install duck by entering the following commands in the terminal:
sudo apt update sudo apt install duck
Description:
checks URLs in debian/control and debian/upstream files
duck, the Debian Url ChecKer, processes several fields in the debian/control, debian/upstream, debian/copyright, debian/patches/* and systemd.unit files and checks if URLs, VCS links and email address domains found therein are valid.
Homepage: http://duck.debian.net
Version: 0.13
Section: universe/devel