sudo apt-get update Hit:1 https://repos.insights.digitalocean.com/apt/do-agent main InRelease Get:2 http://mirrors.digitalocean.com/ubuntu focal InRelease [265 kB] Hit:3 http://mirrors.digitalocean.com/ubuntu focal-updates InRelease Hit:4 http://mirrors.digitalocean.com/ubuntu focal-backports InRelease Get:5 http://security.ubuntu.com/ubuntu focal-security InRelease [114 kB] Get:6 https://repos-droplet.digitalocean.com/apt/droplet-agent main InRelease [5518 B] Hit:7 https://download.docker.com/linux/ubuntu focal InRelease Err:6 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 384 kB in 1s (411 kB/s) Reading package lists... Done 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.
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I ran into this problem today also. I do not know what changed that necessitated this, but this resolved it for me:
Several other methods of adding the key did not work. For whatever reason, only the above did.
To fix this I had to fully remove and re-install the digital ocean agent, which meant:
sudo dpkg --configure -a
sudo apt-get remove droplet-agent
sudo rm /etc/apt/sources.list.d/droplet-agent.list
sudo apt-get update
wget -qO- https://repos-droplet.digitalocean.com/install.sh | sudo bash
Same problem. Did you/anyone get an answer? Support is impossible to reach which I find disappointing. The last time I needed support was perhaps a few years ago and I do not recall it being unavailable or buried so deep to have made the search cost so high that I gave up trying to find out how to get Digitalocean to unbreak our servers.
EDIT: I just saw the thread. It is solved, but nevertheless annoying/disappointing/dissatisfying. I am particularly annoyed at the impossibility of even asking Digitalocean staff for support. Cannot create a support ticket without logging in, cannot log in because there is no password, cannot get password - perhaps only available if I pay them for support to not break my servers. Insane.