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。

相关问题

All packages are up to date. W: http://mirrors.aliyun.com/ubuntu/dists/bionic/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details. W: http://mirrors.aliyun.com/ubuntu/dists/bionic-security/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details. W: http://mirrors.aliyun.com/ubuntu/dists/bionic-updates/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details. W: http://mirrors.aliyun.com/ubuntu/dists/bionic-proposed/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details. W: http://mirrors.aliyun.com/ubuntu/dists/bionic-backports/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.

这些警告是由于使用Aliyun镜像源进行Ubuntu软件包更新时出现的。尽管警告信息出现，但它们并不表示软件包没有更新。你可以继续使用已经更新的软件包，而不会产生任何问题。警告信息只是在提醒你使用了不再推荐的apt-key命令进行验证。

如果你对警告信息感到不安，你可以考虑更换其他镜像源或手动更新公钥。以下是手动更新公钥的步骤：

1. 打开终端，输入以下命令以备份旧的trusted.gpg文件：

sudo mv /etc/apt/trusted.gpg /etc/apt/trusted.gpg.backup

2. 创建一个新的trusted.gpg文件：

sudo touch /etc/apt/trusted.gpg

3. 使用wget命令下载Aliyun的公钥文件：

sudo wget http://mirrors.aliyun.com/ubuntu/project/ubuntu-archive-keyring.gpg -O /etc/apt/trusted.gpg.d/ubuntu-archive-keyring.gpg

4. 更新APT软件包列表：

sudo apt update

请注意，这些警告信息并不会影响你正常使用已更新的软件包。如果你还有其他问题，请随时提问。

Ign:1 http://mirrors.tuna.tsinghua.edu.cn/ros/ubuntu bionic/main arm64 ros-melodic-camera-calibration-parsers arm64 1.11.13-0bionic.20221025.222229 Err:2 http://mirrors.aliyun.com/ubuntu-ports bionic/main arm64 libv4l2rds0 arm64 1.14.2-1 Temporary failure resolving 'mirrors.aliyun.com' Ign:3 http://mirrors.tuna.tsinghua.edu.cn/ros/ubuntu bionic/main arm64 ros-melodic-camera-info-manager arm64 1.11.13-0bionic.20221025.222546 Err:4 http://mirrors.aliyun.com/ubuntu-ports bionic/universe arm64 libyaml-cpp0.5v5 arm64 0.5.2-4ubuntu1 Temporary failure resolving 'mirrors.aliyun.com' Err:1 http://packages.ros.org/ros/ubuntu bionic/main arm64 ros-melodic-camera-calibration-parsers arm64 1.11.13-0bionic.20221025.222229 Temporary failure resolving 'mirrors.tuna.tsinghua.edu.cn' Ign:5 http://mirrors.tuna.tsinghua.edu.cn/ros/ubuntu bionic/main arm64 ros-melodic-usb-cam arm64 0.3.7-1bionic.20230322.235948 Err:6 http://mirrors.aliyun.com/ubuntu-ports bionic/universe arm64 libyaml-cpp-dev arm64 0.5.2-4ubuntu1 Temporary failure resolving 'mirrors.aliyun.com' Err:3 http://packages.ros.org/ros/ubuntu bionic/main arm64 ros-melodic-camera-info-manager arm64 1.11.13-0bionic.20221025.222546 Temporary failure resolving 'mirrors.tuna.tsinghua.edu.cn' Err:7 http://mirrors.aliyun.com/ubuntu-ports bionic/universe arm64 v4l-utils arm64 1.14.2-1 Temporary failure resolving 'mirrors.aliyun.com' Err:5 http://packages.ros.org/ros/ubuntu bionic/main arm64 ros-melodic-usb-cam arm64 0.3.7-1bionic.20230322.235948 Temporary failure resolving 'mirrors.tuna.tsinghua.edu.cn' E: Failed to fetch http://mirrors.aliyun.com/ubuntu-ports/pool/main/v/v4l-utils/libv4l2rds0_1.14.2-1_arm64.deb Temporary failure resolving 'mirrors.aliyun.com' E: Failed to fetch http://mirrors.aliyun.com/ubuntu-ports/pool/universe/y/yaml-cpp/libyaml-cpp0.5v5_0.5.2-4ubuntu1_arm64.deb Temporary failure resolving 'mirrors.aliyun.com' E: Failed to fetch http://mirrors.aliyun.com/ubuntu-ports/pool/universe/y/yaml-cpp/libyaml-cpp-dev_0.5.2-4ubuntu1_arm64.deb Temporary failure resolving 'mirrors.aliyun.com' E: Failed to fetch http://packages.ros.org/ros/ubuntu/pool/main/r/ros-melodic-camera-calibration-parsers/ros-melodic-camera-calibration-parsers_1.11.13-0bionic.20221025.222229_arm64.deb Temporary failure resolving 'mirrors.tuna.tsinghua.edu.cn' E: Failed to fetch http://packages.ros.org/ros/ubuntu/pool/main/r/ros-melodic-camera-info-manager/ros-melodic-camera-info-manager_1.11.13-0bionic.20221025.222546_arm64.deb Temporary failure resolving 'mirrors.tuna.tsinghua.edu.cn' E: Failed to fetch http://mirrors.aliyun.com/ubuntu-ports/pool/universe/v/v4l-utils/v4l-utils_1.14.2-1_arm64.deb Temporary failure resolving 'mirrors.aliyun.com' E: Failed to fetch http://packages.ros.org/ros/ubuntu/pool/main/r/ros-melodic-usb-cam/ros-melodic-usb-cam_0.3.7-1bionic.20230322.235948_arm64.deb Temporary failure resolving 'mirrors.tuna.tsinghua.edu.cn' E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

这些错误是由于无法解析软件源地址引起的。可能是由于网络连接问题或者软件源服务器暂时无法访问所导致的。你可以尝试以下方法来解决这个问题：

1. 检查你的网络连接，确保你可以正常访问互联网。
2. 确认软件源地址是否正确，你可以尝试手动在浏览器中访问这些地址来检查是否可以访问。
3. 如果你使用的是代理服务器，请确保配置正确，并且代理服务器可以正常连接到软件源地址。
4. 尝试使用其他软件源地址，比如使用其他镜像站点或者更换为其他可靠的软件源。
5. 运行 `apt-get update` 命令来更新软件包索引文件，然后再次尝试安装软件包。
6. 如果以上方法都无效，你可以尝试使用 `--fix-missing` 参数运行 `apt-get` 命令，例如：`sudo apt-get --fix-missing install`。

希望这些方法可以帮助你解决问题。如果问题仍然存在，请提供更多的错误信息或者具体的操作系统版本，以便我们提供更准确的帮助。