duck

checks URLs in debian/control and debian/upstream files

Debian Debian
RUN apt-get update && \ apt-get install -y duck
Ubuntu
RUN apt-get update && \ apt-get install -y duck
image/svg+xml Kali Linux
RUN apt-get update && \ apt-get install -y duck
Raspbian
RUN apt-get update && \ apt-get install -y duck
click the source code to copy install duck on any operating system with command-not-found.com