相关疑难解决方法(0)

我使用 Software Sources 程序添加了一些额外的存储库。但是当我重新加载包数据库时，出现如下错误：

W：GPG 错误：http : //ppa.launchpad.net trusty InRelease：以下签名无法验证，因为公钥不可用：NO_PUBKEY 8BAF9A6F

apt-key根据官方的 Ubuntu 文档，我知道我可以在终端中修复它。但我希望以图形方式进行。有没有办法在不使用终端的情况下做到这一点？

最近apt update && apt full-upgrade我在apt full-upgrade随后运行时开始收到以下错误：

Get:4 https://repo.skype.com/deb stable InRelease [4,502 B]                                        
Err:4 https://repo.skype.com/deb stable InRelease
  The following signatures were invalid: EXPKEYSIG 1F3045A5DF7587C3 Skype Linux Client Repository <se-um@microsoft.com>
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://repo.skype.com/deb stable InRelease: The following signatures were invalid: EXPKEYSIG 1F3045A5DF7587C3 Skype Linux Client Repository <se-um@microsoft.com>
W: Failed to fetch https://repo.skype.com/deb/dists/stable/InRelease  The following signatures were invalid: …

不能sudo apt-get update：

Ign:8 http://download.opensuse.org/repositories/home:/Horst3180/xUbuntu_16.04  Release.gpg
Reading package lists... Done    
W: GPG error: http://download.opensuse.org/repositories/home:/Horst3180/xUbuntu_16.04  Release: The following signatures were invalid: EXPKEYSIG 5A7D1D38BEB6D886 home:Horst3180 OBS Project <home:Horst3180@build.opensuse.org>
E: The repository 'http://download.opensuse.org/repositories/home:/Horst3180/xUbuntu_16.04  Release' is not signed.

从无数次尝试中，我得到

1 signature not checked due to a missing key

我的尝试是：

sudo apt-key adv --keyserver hkp://keys.gnupg.net:80 --recv-keys 5A7D1D38BEB6D886
Executing: /tmp/apt-key-gpghome.f5yVraTkTa/gpg.1.sh --keyserver hkp://keys.gnupg.net:80 --recv-keys 5A7D1D38BEB6D886
gpg: key 5A7D1D38BEB6D886: 1 signature not checked due to a missing key
gpg: key 5A7D1D38BEB6D886: "home:Horst3180 OBS Project <home:Horst3180@build.opensuse.org>" not …

我正在尝试更新我的 Kubuntu 22.04 LTS。出现此错误：

7 packages can be upgraded. Run 'apt list --upgradable' to see them.
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://dl.yarnpkg.com/debian stable InRelease: The following signatures were invalid: EXPKEYSIG 23E7166788B63E1E Yarn Packaging <yarn@dan.cx>
W: Failed to fetch https://dl.yarnpkg.com/debian/dists/stable/InRelease  The following signatures were invalid: EXPKEYSIG 23E7166788B63E1E Yarn Packaging <yarn@dan.cx>
W: Some index files failed to download. They have been ignored, or old …

当我sudo apt-get update在完全更新的 Ubuntu 16.04.6 LTS 上运行时，我收到有关 Google 存储库的以下错误：

$ sudo apt update
...
Err:20 http://dl.google.com/linux/earth/deb stable Release.gpg
  The following signatures were invalid: KEYEXPIRED 1555048520  KEYEXPIRED 1555048520  KEYEXPIRED 1555048520  KEYEXPIRED 1555048520
Get:21 http://archive.ubuntu.com/ubuntu xenial-backports InRelease [107 kB]
Err:13 http://dl.google.com/linux/chrome/deb stable Release.gpg 
  The following signatures were invalid: KEYEXPIRED 1555048520  KEYEXPIRED 1555048520  KEYEXPIRED 1555048520  KEYEXPIRED 1555048520
...
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: …

每当我尝试更新终端时都会告诉我这个

Ign:20 http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Release.gpg
Reading package lists... Done 
W: GPG error: http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Release: The following signatures were invalid: EXPKEYSIG 2F7F0DA5FD5B64B9 home:strycore OBS Project <home:strycore@build.opensuse.org>
E: The repository 'http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Release' 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.

'http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Release' 未签名的答案并不能解决我的问题。