Using an Ubuntu 22 droplet. It has been working fine for a few months including regular apt updates. But today’s
apt update has a failure.
$ apt update Hit:1 https://repos.insights.digitalocean.com/apt/do-agent main InRelease Hit:2 http://mirrors.digitalocean.com/ubuntu jammy InRelease Hit:3 http://mirrors.digitalocean.com/ubuntu jammy-updates InRelease Hit:4 http://mirrors.digitalocean.com/ubuntu jammy-backports InRelease Get:5 https://repos-droplet.digitalocean.com/apt/droplet-agent main InRelease [5,518 B] Hit:6 http://security.ubuntu.com/ubuntu jammy-security InRelease Err:5 https://repos-droplet.digitalocean.com/apt/droplet-agent main InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 35696F43FC7DB4C2 Fetched 5,518 B in 7s (803 B/s) Reading package lists... Done Building dependency tree... Done Reading state information... Done 7 packages can be upgraded. Run 'apt list --upgradable' to see them. W: https://repos.insights.digitalocean.com/apt/do-agent/dists/main/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details. W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://repos-droplet.digitalocean.com/apt/droplet-agent main InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 35696F43FC7DB4C2 W: Failed to fetch https://repos-droplet.digitalocean.com/apt/droplet-agent/dists/main/InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 35696F43FC7DB4C2 W: Some index files failed to download. They have been ignored, or old ones used instead.
Does Digital Ocean have a known fix for this?
To be clear,
apt is able to retrieve most updates, and I can still install packages using
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