问题描述

您希望继续执行吗？ [Y/n] Y
错误:1 http://cn.archive.ubuntu.com/ubuntu focal/universe amd64 binfmt-support amd64 2.2.0-2
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达) 无法连接上 cn.archive.ubuntu.com:80 (91.189.91.38)，连接超时 无法连接上 cn.archive.ubuntu.com:80 (91.189.91.39)，连接超时
错误:2 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 libllvm11 amd64 1:11.0.0-2~ubuntu20.04.1
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)
错误:3 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 libclang-cpp11 amd64 1:11.0.0-2~ubuntu20.04.1
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)
错误:4 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 libclang-common-11-dev amd64 1:11.0.0-2~ubuntu20.04.1
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)
错误:5 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 libclang1-11 amd64 1:11.0.0-2~ubuntu20.04.1
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)
错误:6 http://cn.archive.ubuntu.com/ubuntu focal-updates/universe amd64 clang-11 amd64 1:11.0.0-2~ubuntu20.04.1
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)
忽略:7 http://cn.archive.ubuntu.com/ubuntu focal-updates/universe amd64 clang-11-doc all 1:11.0.0-2~ubuntu20.04.1
错误:8 http://cn.archive.ubuntu.com/ubuntu focal-updates/universe amd64 clang-format-11 amd64 1:11.0.0-2~ubuntu20.04.1
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)
错误:9 http://cn.archive.ubuntu.com/ubuntu focal-updates/universe amd64 clang-tools-11 amd64 1:11.0.0-2~ubuntu20.04.1
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)
错误:10 http://cn.archive.ubuntu.com/ubuntu focal-updates/universe amd64 clang-tidy-11 amd64 1:11.0.0-2~ubuntu20.04.1
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)
错误:11 http://cn.archive.ubuntu.com/ubuntu focal-updates/universe amd64 clangd-11 amd64 1:11.0.0-2~ubuntu20.04.1
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)
错误:12 http://cn.archive.ubuntu.com/ubuntu focal-updates/universe amd64 libc++abi1-11 amd64 1:11.0.0-2~ubuntu20.04.1
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)
错误:13 http://cn.archive.ubuntu.com/ubuntu focal-updates/universe amd64 libc++1-11 amd64 1:11.0.0-2~ubuntu20.04.1
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)
错误:14 http://cn.archive.ubuntu.com/ubuntu focal-updates/universe amd64 libc+±11-dev amd64 1:11.0.0-2~ubuntu20.04.1
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)
错误:15 http://cn.archive.ubuntu.com/ubuntu focal-updates/universe amd64 libc++abi-11-dev amd64 1:11.0.0-2~ubuntu20.04.1
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)
错误:16 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 libclang-11-dev amd64 1:11.0.0-2~ubuntu20.04.1
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)
错误:17 http://cn.archive.ubuntu.com/ubuntu focal-updates/universe amd64 libomp5-11 amd64 1:11.0.0-2~ubuntu20.04.1
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)
错误:18 http://cn.archive.ubuntu.com/ubuntu focal-updates/universe amd64 libomp-11-dev amd64 1:11.0.0-2~ubuntu20.04.1
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)
错误:19 http://cn.archive.ubuntu.com/ubuntu focal-updates/universe amd64 llvm-11-runtime amd64 1:11.0.0-2~ubuntu20.04.1
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)
错误:20 http://cn.archive.ubuntu.com/ubuntu focal/main amd64 libpfm4 amd64 4.10.1+git20-g7700f49-2
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)
错误:21 http://cn.archive.ubuntu.com/ubuntu focal-updates/universe amd64 llvm-11 amd64 1:11.0.0-2~ubuntu20.04.1
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)
错误:22 http://cn.archive.ubuntu.com/ubuntu focal/main amd64 libffi-dev amd64 3.3-4
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)
忽略:23 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 python3-pygments all 2.3.1+dfsg-1ubuntu2.2
错误:24 http://cn.archive.ubuntu.com/ubuntu focal-updates/universe amd64 llvm-11-tools amd64 1:11.0.0-2~ubuntu20.04.1
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)
错误:25 http://cn.archive.ubuntu.com/ubuntu focal/universe amd64 libz3-4 amd64 4.8.7-4build1
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)
错误:26 http://cn.archive.ubuntu.com/ubuntu focal/universe amd64 libz3-dev amd64 4.8.7-4build1
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)
错误:27 http://cn.archive.ubuntu.com/ubuntu focal-updates/universe amd64 llvm-11-dev amd64 1:11.0.0-2~ubuntu20.04.1
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)
错误:7 http://cn.archive.ubuntu.com/ubuntu focal-updates/universe amd64 clang-11-doc all 1:11.0.0-2~ubuntu20.04.1
无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::18) 的连接 - connect (101: 网络不可达) 无法发起与 cn.archive.ubuntu.com:80 (2001:67c:1562::15) 的连接 - connect (101: 网络不可达)

问题分析

这个地址应该是挂了，此外尝试挂了梯子仍无法解决，最后决定换个国内源

问题解决

1. 打开 apt 源的配置文件

sudo vim /etc/apt/sources.list

2. 将其中 http://cn.archive.ubuntu.com 全部替换成阿里源 http://mirrors.aliyun.com
   

   # deb cdrom:[Ubuntu 20.04 LTS _Focal Fossa_ - Release amd64 (20200423)]/ focal main restricted # See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to# newer versions of the distribution.# deb http://cn.archive.ubuntu.com/ubuntu/ focal main restricteddeb http://mirrors.aliyun.com/ubuntu/ focal main restricted# deb-src http://cn.archive.ubuntu.com/ubuntu/ focal main restricted## Major bug fix updates produced after the final release of the## distribution.# deb http://cn.archive.ubuntu.com/ubuntu/ focal-updates main restricteddeb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted# deb-src http://cn.archive.ubuntu.com/ubuntu/ focal-updates main restricted## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu## team. Also, please note that software in universe WILL NOT receive any## review or updates from the Ubuntu security team.# deb http://cn.archive.ubuntu.com/ubuntu/ focal universedeb http://mirrors.aliyun.com/ubuntu/ focal universe# deb-src http://cn.archive.ubuntu.com/ubuntu/ focal universe# deb http://cn.archive.ubuntu.com/ubuntu/ focal-updates universedeb http://mirrors.aliyun.com/ubuntu/ focal-updates universe# deb-src http://cn.archive.ubuntu.com/ubuntu/ focal-updates universe## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu ## team, and may not be under a free licence. Please satisfy yourself as to ## your rights to use the software. Also, please note that software in ## multiverse WILL NOT receive any review or updates from the Ubuntu## security team.# deb http://cn.archive.ubuntu.com/ubuntu/ focal multiversedeb http://mirrors.aliyun.com/ubuntu/ focal multiverse# deb-src http://cn.archive.ubuntu.com/ubuntu/ focal multiverse# deb http://cn.archive.ubuntu.com/ubuntu/ focal-updates multiversedeb http://mirrors.aliyun.com/ubuntu/ focal-updates multiverse# deb-src http://cn.archive.ubuntu.com/ubuntu/ focal-updates multiverse## N.B. software from this repository may not have been tested as# deb cdrom:[Ubuntu 20.04 LTS _Focal Fossa_ - Release amd64 (20200423)]/ focal main restricted# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to# newer versions of the distribution.# deb http://cn.archive.ubuntu.com/ubuntu/ focal main restricteddeb http://mirrors.aliyun.com/ubuntu/ focal main restricted# deb-src http://cn.archive.ubuntu.com/ubuntu/ focal main restricted## Major bug fix updates produced after the final release of the## distribution.# deb http://cn.archive.ubuntu.com/ubuntu/ focal-updates main restricteddeb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted# deb-src http://cn.archive.ubuntu.com/ubuntu/ focal-updates main restricted## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu## team. Also, please note that software in universe WILL NOT receive any## review or updates from the Ubuntu security team.# deb http://cn.archive.ubuntu.com/ubuntu/ focal universedeb http://mirrors.aliyun.com/ubuntu/ focal universe# deb-src http://cn.archive.ubuntu.com/ubuntu/ focal universe# deb http://cn.archive.ubuntu.com/ubuntu/ focal-updates universedeb http://mirrors.aliyun.com/ubuntu/ focal-updates universe# deb-src http://cn.archive.ubuntu.com/ubuntu/ focal-updates universe## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu ## team, and may not be under a free licence. Please satisfy yourself as to ## your rights to use the software. Also, please note that software in ## multiverse WILL NOT receive any review or updates from the Ubuntu## security team.# deb http://cn.archive.ubuntu.com/ubuntu/ focal multiversedeb http://mirrors.aliyun.com/ubuntu/ focal multiverse# deb-src http://cn.archive.ubuntu.com/ubuntu/ focal multiverse# deb http://cn.archive.ubuntu.com/ubuntu/ focal-updates multiversedeb http://mirrors.aliyun.com/ubuntu/ focal-updates multiverse# deb-src http://cn.archive.ubuntu.com/ubuntu/ focal-updates multiverse## N.B. software from this repository may not have been tested as## extensively as that contained in the main release, although it includes## newer versions of some applications which may provide useful features.## Also, please note that software in backports WILL NOT receive any review## or updates from the Ubuntu security team.# deb http://cn.archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiversedeb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse# deb-src http://cn.archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse## Uncomment the following two lines to add software from Canonical's## 'partner' repository.## This software is not part of Ubuntu, but is offered by Canonical and the## respective vendors as a service to Ubuntu users.# deb http://archive.canonical.com/ubuntu focal partner# deb-src http://archive.canonical.com/ubuntu focal partner# deb http://security.ubuntu.com/ubuntu focal-security main restricteddeb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted# deb-src http://security.ubuntu.com/ubuntu focal-security main restricted# deb http://security.ubuntu.com/ubuntu focal-security universedeb http://mirrors.aliyun.com/ubuntu/ focal-security universe# deb-src http://security.ubuntu.com/ubuntu focal-security universe# deb http://security.ubuntu.com/ubuntu focal-security multiversedeb http://mirrors.aliyun.com/ubuntu/ focal-security multiverse# deb-src http://security.ubuntu.com/ubuntu focal-security multiverse# This system was installed using small removable media# (e.g. netinst, live or single CD). The matching "deb cdrom"# entries were disabled at the end of the installation process.# For information about how to configure apt package sources,# see the sources.list(5) manual.deb https://cloud.r-project.org/bin/linux/ubuntu focal-cran40/# deb-src https://cloud.r-project.org/bin/linux/ubuntu focal-cran40/### note: 未注释的配置上方一行为原来的配置，还原只需交换相应的注释即可

   实践发现，http://security.ubuntu.com/ubuntu 这个也挂了，所以将它也替换成阿里源
3. 更新 apt

   sudo apt update

   
   全部命中！解决

额外说明

1. 备份

为了方便还原或者出现其他不可名状的错误，你应该在执行上述步骤前做好备份

cp /etc/apt/sources.list /etc/apt/sources.list.bak

2. 替换命令

sudo sed -i 's/archive.ubuntu.com/mirrors.aliyun.com/g' /etc/apt/sources.list

其他源

中科大：mirrors.aliyun.com

参考文章

1. Ubuntu 更换国内源【个人博客】
2. ubuntu官方国内源【CSDN】