错误指出：
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://repo.mysql.com/apt/ubuntu bionic InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 467B942D3A79BD29
W: Failed to fetch http://repo.mysql.com/apt/ubuntu/dists/bionic/InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 467B942D3A79BD29
W: Some index files failed to download. They have been ignored, or old ones used instead.
机器信息：
Linux abt33 5.4.0-167-generic #184-Ubuntu SMP Tue Oct 31 09:21:49 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.6 LTS
Release: 20.04
Codename: focal
我尝试了来自 stackoverflow 等的许多建议：我尝试了以下操作，但没有成功：
sudo curl http://repo.ros2.org/repos.key | sudo apt-key add -
sudo curl -fsSLo /usr/share/keyrings/kubernetes-archive-keyring.gpg https://dl.k8s.io/apt/doc/apt-key.gpg
wget -O - https://apt.kitware.com/keys/kitware-archive-latest.asc 2>/dev/null | gpg --dearmor - | sudo tee /usr/share/keyrings/kitware-archive-keyring.gpg >/dev/null
echo 'deb [signed-by=/usr/share/keyrings/kitware-archive-keyring.gpg] https://apt.kitware.com/ubuntu/ focal main' | sudo tee /etc/apt/sources.list.d/kitware.list >/dev/null
curl -fsSL https://download.opensuse.org/repositories/home:pzz/xUbuntu_20.04/Release.key | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/home_pzz.gpg > /dev/null
sudo rm /usr/share/keyrings/kitware-archive-keyring.gpg followed by
sudo apt-get install kitware-archive-keyring
这是我的钥匙：
apt-key list /etc/apt/trusted.gpg
--------------------
pub rsa4096 2020-03-02 [SC] [expires: 2024-03-01]
F640 3F65 44A3 8863 DAA0 B6E0 3F01 618A 5131 2F3F
uid [ unknown] GitLab B.V. (package repository signing key) <[email protected]>
sub rsa4096 2020-03-02 [E] [expires: 2024-03-01]
pub dsa1024 2003-02-03 [SCA] [expired: 2022-02-16]
A4A9 4068 76FC BD3C 4567 70C8 8C71 8D3B 5072 E1F5
uid [ expired] MySQL Release Engineering <[email protected]>
pub rsa4096 2019-05-30 [SC] [expires: 2025-06-01]
C1CF 6E31 E6BA DE88 68B1 72B4 F42E D6FB AB17 C654
uid [ unknown] Open Robotics <[email protected]>
/etc/apt/trusted.gpg.d/home_pzz.gpg
-----------------------------------
pub rsa2048 2019-11-30 [SC] [expires: 2024-04-23]
CDE7 95FF 222A BFA5 503F 6E49 23E0 7629 B9E3 C9E4
uid [ unknown] home:pzz OBS Project <home:[email protected]>
/etc/apt/trusted.gpg.d/ubuntu-keyring-2012-archive.gpg
------------------------------------------------------
pub rsa4096 2012-05-11 [SC]
790B C727 7767 219C 42C8 6F93 3B4F E6AC C0B2 1F32
uid [ unknown] Ubuntu Archive Automatic Signing Key (2012) <[email protected]>
/etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg
------------------------------------------------------
pub rsa4096 2012-05-11 [SC]
8439 38DF 228D 22F7 B374 2BC0 D94A A3F0 EFE2 1092
uid [ unknown] Ubuntu CD Image Automatic Signing Key (2012) <[email protected]>
/etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg
------------------------------------------------------
pub rsa4096 2018-09-17 [SC]
F6EC B376 2474 EDA9 D21B 7022 8719 20D1 991B C93C
uid [ unknown] Ubuntu Archive Automatic Signing Key (2018) <[email protected]>
似乎没什么效果。有人有解决方案吗？谢谢。
答案1
事实证明，这个办法似乎奏效了。
卷曲https://repo.mysql.com/RPM-GPG-KEY-mysql-2022| sudo apt-key 添加 -