the public key is not available: NO_PUBKEY 23F3D4EA75716059

[cysabi]

I have seen the latest issues on the expired public key, but even after attempting to remove old keys, I still get the same error when running sudo apt update.

W: GPG error: https://cli.github.com/packages focal InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 23F3D4EA75716059
E: The repository 'https://cli.github.com/packages focal InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

I have attempted to run sudo apt-key del C99B11DEB97541F0 && sudo rm /etc/apt/sources.list.d/github-cli.list

I'm not quite familiar with the way keys are added and removed so I apologize if this has an obvious solution.
Thank you!

[andrew-aitchison]

Removing the old key is not the issue; you need to download the new one see https://github.com/cli/cli/blob/trunk/docs/install_linux.md#debian-ubuntu-linux-raspberry-pi-os-apt

[cysabi]

I have tried running that command

[envis10n]

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 23F3D4EA75716059

[andrew-aitchison]

That should work, but apt-key is deprecated in Ubuntu 22.04.

[rayslinky]

The problem is that /etc/apt/sources.list.d/githubcli.list points to /usr/share/keyrings/githubcli.gpg, so you need to download the new key and replace that file.

[GregWierzchowski]

What worked for me was editing the file /etc/apt/sources.list.d/github-cli.list manually and removing "signed-by=/usr/share/keyrings/githubcli-archive-keyring.gp". The key was already in the standard key store, as I found when trying to download it:
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 23F3D4EA75716059 2 ↵ Executing: /tmp/apt-key-gpghome.XKKPYoHwQB/gpg.1.sh --keyserver keyserver.ubuntu.com --recv-keys 23F3D4EA75716059 gpg: key 23F3D4EA75716059: "GitHub CLI <opensource+cli@github.com>" not changed gpg: Total number processed: 1 gpg: unchanged: 1

[josecelano]

For me, this was the only thing that worked:

https://superuser.com/a/1744043/277693