Note: these steps are only for debian stable (trixie).
cat << EOF | sudo tee /etc/apt/sources.list.d/debian-backports.sources
Types: deb deb-src
URIs: http://deb.debian.org/debian
Suites: trixie-backports
Components: main
Enabled: yes
Signed-By: /usr/share/keyrings/debian-archive-keyring.gpg
EOF
sudo apt update && sudo apt install bitcoin-knots/trixie-backports datum-gateway/trixie-backports
You can choose between two configuration mode:
sudo dpkg-reconfigure -pmedium bitcoin-knots datum-gateway
sudo dpkg-reconfigure -plow bitcoin-knots datum-gateway