I'm confused. The commands listed e.g.$ sudo wget http://netcologne.dl.sourceforge.net/project/d-apt/files/d-apt.list -O /etc/apt/sources.list.d/d-apt.list $ sudo apt-get update && sudo apt-get -y --allow-unauthenticated install --reinstall d-apt-keyring && sudo apt-get updateShould work. If it does not, please post output.
Sorry, it works,but can't get any useful info.