GPG error: https://git.launchpad.net/ubuntu/+source/gcc-defaults/log/?h=ubuntu/focal focal Release: Signed file isn't valid, got 'NODATA' (does the network require authentication?)

如果在使用 `sudo apt update` 命令时遇到 "GPG error" 并提示 "Signed file isn't valid, got 'NODATA'" 错误，可能是由于以下原因之一：

1. 网络问题：首先，请确保您的网络连接正常，并且没有阻止访问所需的资源。您可以尝试使用浏览器访问 `https://git.launchpad.net/ubuntu/+source/gcc-defaults/log/?h=ubuntu/focal` 来检查是否可以正常访问。

2. 软件源配置问题：这个错误可能是由于软件源的配置问题引起的。请确保您已正确添加了软件源，并且配置正确。您可以再次检查 `/etc/apt/sources.list` 文件以确保没有任何错误。

3. GPG 密钥问题：软件源通常使用 GPG 密钥来验证软件包的完整性和真实性。如果软件源的 GPG 密钥不正确或过期，也会导致此错误。您可以尝试重新导入软件源的 GPG 密钥来解决此问题。可以使用以下命令导入密钥：

   sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys <KEY_ID>

其中 `<KEY_ID>` 是软件源的 GPG 密钥 ID。您可以在软件源的官方网站或文档中找到密钥 ID。

如果您尝试了上述解决方法后仍然遇到问题，建议您检查软件源的设置和网络连接，并确保软件源的完整性和可用性。如果问题仍然存在，您可以考虑使用其他可靠的软件源或寻求相关支持。

相关问题

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://ppa.launchpadcontent.net/apt-fast/stable/ubuntu jammy InRelease: Splitting up /var/lib/apt/lists/ppa.launchpadcontent.net_apt-fast_stable_ubuntu_dists_jammy_InRelease into data and signature failed W: GPG error: https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy InRelease: Splitting up /var/lib/apt/lists/partial/mirrors.tuna.tsinghua.edu.cn_ubuntu_dists_jammy_InRelease into data and signature failed E: The repository 'https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy 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. W: GPG error: https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-updates InRelease: Splitting up /var/lib/apt/lists/partial/mirrors.tuna.tsinghua.edu.cn_ubuntu_dists_jammy-updates_InRelease into data and signature failed E: The repository 'https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-updates 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. W: GPG error: https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-backports InRelease: Splitting up /var/lib/apt/lists/partial/mirrors.tuna.tsinghua.edu.cn_ubuntu_dists_jammy-backports_InRelease into data and signature failed E: The repository 'https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-backports 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. E: The repository 'http://archive.ubuntu.com/ubuntu trusty Release' does not have a Release file. 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. E: The repository 'https://ppa.launchpadcontent.net/notepadqq-team/notepadqq/ubuntu jammy Release' does not have a Release file. 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.

这些错误信息表明，apt 在更新软件包时遇到了签名验证失败的问题。这可能是由于存储库中的 GPG 签名已过期或无法验证，或者存储库本身没有签名。

你可以尝试以下方法来解决此问题：

1. 检查你的网络连接是否正常，并确保能够访问相应的存储库。

2. 如果是第一次遇到此问题，你可以尝试更新 apt 的密钥列表。你可以使用以下命令更新密钥列表：

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

3. 如果密钥列表无效，则需要重新导入相关存储库的 GPG 公钥。你可以通过以下命令来导入 GPG 公钥：

   sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys <KEY>

其中，`<KEY>` 是存储库的 GPG 公钥 ID。

4. 如果存储库没有签名，则你需要考虑使用其他可信赖的存储库或联系存储库的维护者寻求帮助。

5. 对于最后两个错误，可能是由于存储库的版本与你的 Ubuntu 版本不兼容所致。你需要检查存储库是否支持你的 Ubuntu 版本，并根据需要将其从源列表中删除。

命令报错： sudo apt update Hit:1 http://mirrors.aliyun.com/ubuntu bionic InRelease Hit:2 http://mirrors.aliyun.com/ubuntu bionic-updates InRelease Hit:3 http://mirrors.aliyun.com/ubuntu bionic-backports InRelease Hit:4 http://mirrors.aliyun.com/ubuntu bionic-security InRelease Get:5 https://mirrors.aliyun.com/docker-ce/linux/ubuntu bionic InRelease [64.4 kB] Ign:6 https://pkg.jenkins.io/debian-stable binary/ InRelease Get:7 https://pkg.jenkins.io/debian-stable binary/ Release [2,044 B] Get:8 https://pkg.jenkins.io/debian-stable binary/ Release.gpg [833 B] Ign:8 https://pkg.jenkins.io/debian-stable binary/ Release.gpg Reading package lists... Done W: GPG error: https://pkg.jenkins.io/debian-stable binary/ Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5BA31D57EF5975CA E: The repository 'http://pkg.jenkins.io/debian-stable binary/ 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.

这个错误是因为缺少 Jenkins 仓库的公钥。您可以按照以下步骤导入公钥并解决问题：

1. 打开终端。
2. 下载 Jenkins 的公钥。输入以下命令并按回车：

   wget -q -O - https://pkg.jenkins.io/debian/jenkins.io.key | sudo apt-key add -

3. 重新运行 `sudo apt update` 命令以更新软件包列表。

现在，您应该能够成功更新软件包列表，然后继续安装 Jenkins。请尝试执行之前的步骤，并告诉我是否还遇到问题。