echo "deb http://debian.zionetrix.net stable main" | sudo tee /etc/apt/sources.list.d/zionetrix.list sudo apt -o Acquire::AllowInsecureRepositories=true -o Acquire::AllowDowngradeToInsecureRepositories=true update sudo apt -o APT::Get::AllowUnauthenticated=true install --yes zionetrix-archive-keyring sudo apt update