To add this repository to your Debian/Ubuntu system, do: # add GPG key curl -s https://deb.frrouting.org/frr/keys.gpg | sudo tee /usr/share/keyrings/frrouting.gpg > /dev/null # possible values for FRRVER: frr-6 frr-7 frr-8 frr-9.0 frr-9.1 frr-stable # frr-stable will be the latest official stable release FRRVER="frr-stable" echo deb '[signed-by=/usr/share/keyrings/frrouting.gpg]' https://deb.frrou