[ROS2 Foxy] 执行sudo apt update 时 出现错误:Ubuntu 22.04 系统中 Temporary failure resolving ‘packages.ros.org‘

Failed to fetch http://packages.ros.org/ros2/ubuntu/pool/main/r/ros-humble-usb-cam/ros-humble-usb-cam 0.8.0-1jammy.20240217.095540 amd64.debTemporary failure resolving 'packages.ros.org'

E: Failed to fetch http://cn.archive.ubuntu.com/ubuntu/pool/universe/p/pocketsphinx/pocketsphinx-en-us 0.8.0%2breal5prealpha%2b1-14ubuntu1 all.deb Temporary failure resolving 'cn.archive.ubuntu.com'

E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

=========================

原因可能是DNS服务器错误。

解决方案：

sudo vi /etc/resolv.conf

添加

nameserver 114.114.114.114

修改后保存，然后执行以下命令使修改生效

sudo resolvconf -u

然后再执行 sudo apt install

参考：

Linux001 | 我走过的弯路之二——Ubuntu 22.04 系统中 ‘Temporary failure resolving‘ 解决方案-优快云博客

Temporary failure resolving——Ubuntu DNS未配置报错与解决-优快云博客

Temporary failure resolving ‘archive.ubuntu.com‘-优快云博客

Ubuntu apt-get install出现“Temporary failure resolving 'cn.archive.ubuntu.com'”_openssh-client amd64 1:8.9p1-3ubuntu0.4 temporary -优快云博客

Ubuntu配置永久DNS_apt-get install resolvconf-优快云博客