guides/linux/linux_devuan_invalid_keyring.md

http://deb.devuan.org/devuan/pool/main/d/devuan-keyring/

$ wget http://deb.devuan.org/devuan/pool/main/d/devuan-keyring/devuan-keyring_2022.09.04_all.deb
# dpkg -i devuan-keyring_2022.09.04_all.deb