grml-keyring ------------ The grml-keyring Debian package provides the OpenPGP certificates for usage with the Grml repositories, see https://deb.grml.org/ and https://grml.org/files/. The package also includes the APT sources configuration for the Grml repositories. But it does *NOT* enable the APT sources configuration automatically, by intention. If you want to get the Grml repositories enabled on your system, and managed through the grml.sources file as shipped by the grml-keyring Debian package, run with root permissions: ln -s /usr/share/grml-keyring/grml.sources /etc/apt/sources.list.d/grml.sources apt update