W: http://us.archive.ubuntu.com/ubuntu/dists/xenial/InRelease: 密钥存储在过时的 trusted.gpg 密钥环中（/etc/apt/trusted.gpg），请参见 apt-key(8) 的 DEPRECATION 一节以了解详情。

这个警告意味着你的 Ubuntu 系统使用了过时的 GPG 密钥环，建议你更新密钥环以避免潜在的安全问题。你可以按照警告信息中提到的方法，查看 apt-key(8) 的 DEPRECATION 一节以了解详情，或者按照以下步骤更新密钥环：

1. 打开终端并输入以下命令：

   sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys [KEY ID]

其中，[KEY ID] 是你需要更新的密钥的 ID。你可以在警告信息中找到该 ID。

2. 等待密钥下载完成后，输入以下命令更新密钥环：

   sudo apt-get update

这样就可以更新密钥环了。如果你还是遇到相同的警告，可以重复以上步骤更新其他过时的密钥。

相关问题

root@6527d9173397:/# apt update Ign:1 http://archive.ubuntu.com/ubuntu jammy InRelease Ign:2 http://security.ubuntu.com/ubuntu jammy-security InRelease Ign:2 http://security.ubuntu.com/ubuntu jammy-security InRelease Ign:3 http://archive.ubuntu.com/ubuntu jammy-updates InRelease Ign:4 http://archive.ubuntu.com/ubuntu jammy-backports InRelease Ign:2 http://security.ubuntu.com/ubuntu jammy-security InRelease Ign:1 http://archive.ubuntu.com/ubuntu jammy InRelease Err:2 http://security.ubuntu.com/ubuntu jammy-security InRelease Temporary failure resolving 'security.ubuntu.com' Ign:3 http://archive.ubuntu.com/ubuntu jammy-updates InRelease Ign:4 http://archive.ubuntu.com/ubuntu jammy-backports InRelease Ign:1 http://archive.ubuntu.com/ubuntu jammy InRelease Ign:3 http://archive.ubuntu.com/ubuntu jammy-updates InRelease Ign:4 http://archive.ubuntu.com/ubuntu jammy-backports InRelease Err:1 http://archive.ubuntu.com/ubuntu jammy InRelease Temporary failure resolving 'archive.ubuntu.com' Err:3 http://archive.ubuntu.com/ubuntu jammy-updates InRelease Temporary failure resolving 'archive.ubuntu.com' Err:4 http://archive.ubuntu.com/ubuntu jammy-backports InRelease Temporary failure resolving 'archive.ubuntu.com' Reading package lists... Done Building dependency tree... Done Reading state information... Done All packages are up to date. W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/jammy/InRelease Temporary failure resolving 'archive.ubuntu.com' W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/jammy-updates/InRelease Temporary failure resolving 'archive.ubuntu.com' W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/jammy-backports/InRelease Temporary failure resolving 'archive.ubuntu.com' W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/jammy-security/InRelease Temporary failure resolving 'security.ubuntu.com' W: Some index files failed to download. They have been ignored, or old ones used instead.

这段代码显示出了在更新 Ubuntu 系统的软件源时出现了一些问题。具体来说，有几个软件源无法连接，导致更新失败。有几个软件源分别是：http://archive.ubuntu.com/ubuntu jammy、http://security.ubuntu.com/ubuntu jammy-security、http://archive.ubuntu.com/ubuntu jammy-updates、http://archive.ubuntu.com/ubuntu jammy-backports。这可能是因为这些软件源已经不存在或者网络连接不稳定等原因。建议检查网络连接和软件源的有效性，或者更换其他可用的软件源。此外，还需要注意的是，该系统版本为 Ubuntu 22.04（即 Jammy Jellyfish），它是目前最新的 Ubuntu 版本，但仍处于开发阶段，可能存在一些不稳定性和兼容性问题。

W: http://archive.ubuntu.com/ubuntu/dists/jammy/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg are ignored as the file is not readable by user '_apt' executing apt-key. W: http://archive.ubuntu.com/ubuntu/dists/jammy/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg are ignored as the file is not readable by user '_apt' executing apt-key. W: GPG error: http://archive.ubuntu.com/ubuntu jammy InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C E: The repository 'http://archive.ubuntu.com/ubuntu jammy InRelease' is not signed. W: http://security.ubuntu.com/ubuntu/dists/jammy-security/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg are ignored as the file is not readable by user '_apt' executing apt-key. W: http://security.ubuntu.com/ubuntu/dists/jammy-security/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg are ignored as the file is not readable by user '_apt' executing apt-key. W: GPG error: http://security.ubuntu.com/ubuntu jammy-security InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C E: The repository 'http://security.ubuntu.com/ubuntu jammy-security InRelease' is not signed. W: http://archive.ubuntu.com/ubuntu/dists/jammy-updates/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg are ignored as the file is not readable by user '_apt' executing apt-key. W: http://archive.ubuntu.com/ubuntu/dists/jammy-updates/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg are ignored as the file is not readable by user '_apt' executing apt-key. W: GPG error: http://archive.ubuntu.com/ubuntu jammy-updates InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C E: The repository 'http://archive.ubuntu.com/ubuntu jammy-updates InRelease' is not signed. W: http://archive.ubuntu.com/ubuntu/dists/jammy-backports/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg are ignored as the file is not readable by user '_apt' executing apt-key. W: http://archive.ubuntu.com/ubuntu/dists/jammy-backports/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg are ignored as the file is not readable by user '_apt' executing apt-key. W: GPG error: http://archive.ubuntu.com/ubuntu jammy-backports InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C E: The repository 'http://archive.ubuntu.com/ubuntu jammy-backports InRelease' is not signed. E: Problem executing scripts APT::Update::Post-Invoke 'rm -f /var/cache/apt/archives/*.deb /var/cache/apt/archives/partial/*.deb /var/cache/apt/*.bin || true' E: Sub-process returned an error code

这个错误是由于apt-key无法读取/etc/apt/trusted.gpg.d/目录下的文件，导致无法验证Ubuntu软件源的签名。解决这个问题的方法是：

1. 使用以下命令导入缺失的公钥：

   sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 871920D1991BC93C

注意替换上述命令中的871920D1991BC93C为您的错误中所提到的缺失的公钥。

2. 如果上述命令无效，可以尝试使用以下命令：

   sudo apt-key adv --refresh-keys --keyserver keyserver.ubuntu.com

3. 如果上述命令仍然无效，可以尝试手动下载公钥并导入。首先，找到缺失的公钥的ID，例如871920D1991BC93C。然后，使用以下命令下载公钥：

   sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 871920D1991BC93C

最后，使用以下命令将公钥导入系统：

   sudo apt-key add /path/to/downloaded/key

注意替换上述命令中的/path/to/downloaded/key为您下载的公钥文件的路径。

完成上述步骤后，再次运行apt-get update应该就不会出现上述错误了。