备份源文件
cp /etc/apt/sources.list /etc/apt/sources.list.bak查询镜像源
原则对应的版本进行安装
清华源
Index of /ubuntu/ | 清华大学开源软件镜像站 | Tsinghua Open Source Mirror
中科大源
Index of /ubuntu-releases/ (ustc.edu.cn)
网易镜像源
Index of /ubuntu-releases/
阿里云镜像源
ubuntu-releases安装包下载_开源镜像站-阿里云 (aliyun.com)
编辑替换镜像源
这里以阿里云为例
sed -i "s#http://archive.ubuntu.com/ubuntu/#http://mirrors.aliyun.com/ubuntu-releases/20.04/#g" /etc/apt/sources.list查看替换好的源文件
cat sources.list# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to# newer versions of the distribution.deb http://archive.ubuntu.com/ubuntu/ jammy main restricted# deb-src http://archive.ubuntu.com/ubuntu/ jammy main restricted## Major bug fix updates produced after the final release of the## distribution.deb http://archive.ubuntu.com/ubuntu/ jammy-updates main restricted# deb-src http://archive.ubuntu.com/ubuntu/ jammy-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://archive.ubuntu.com/ubuntu/ jammy universe# deb-src http://archive.ubuntu.com/ubuntu/ jammy universedeb http://archive.ubuntu.com/ubuntu/ jammy-updates universe# deb-src http://archive.ubuntu.com/ubuntu/ jammy-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://archive.ubuntu.com/ubuntu/ jammy multiverse# deb-src http://archive.ubuntu.com/ubuntu/ jammy multiversedeb http://archive.ubuntu.com/ubuntu/ jammy-updates multiverse# deb-src http://archive.ubuntu.com/ubuntu/ jammy-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://archive.ubuntu.com/ubuntu/ jammy-backports main restricted universe multiverse# deb-src http://archive.ubuntu.com/ubuntu/ jammy-backports main restricted universe multiversedeb http://security.ubuntu.com/ubuntu/ jammy-security main restricted# deb-src http://security.ubuntu.com/ubuntu/ jammy-security main restricteddeb http://security.ubuntu.com/ubuntu/ jammy-security universe# deb-src http://security.ubuntu.com/ubuntu/ jammy-security universedeb http://security.ubuntu.com/ubuntu/ jammy-security multiverse# deb-src http://security.ubuntu.com/ubuntu/ jammy-security multiverseroot@da9676fe8449:/etc/apt# sed -i "s/http://archive.ubuntu.com/ubuntu//http://mirrors.ustc.edu.cn/ubuntu-releases/20.04//g" /etc/apt/sources.list;sed: -e expression #1, char 10: unknown option to `s'root@da9676fe8449:/etc/apt# sed -i "s#http://archive.ubuntu.com/ubuntu/#http://mirrors.aliyun.com/ubuntu-releases/20.04/#g" /etc/apt/sources.listroot@da9676fe8449:/etc/apt# cat sources.list# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to# newer versions of the distribution.deb http://mirrors.aliyun.com/ubuntu-releases/20.04/ jammy main restricted# deb-src http://mirrors.aliyun.com/ubuntu-releases/20.04/ jammy main restricted## Major bug fix updates produced after the final release of the## distribution.deb http://mirrors.aliyun.com/ubuntu-releases/20.04/ jammy-updates main restricted# deb-src http://mirrors.aliyun.com/ubuntu-releases/20.04/ jammy-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://mirrors.aliyun.com/ubuntu-releases/20.04/ jammy universe# deb-src http://mirrors.aliyun.com/ubuntu-releases/20.04/ jammy universedeb http://mirrors.aliyun.com/ubuntu-releases/20.04/ jammy-updates universe# deb-src http://mirrors.aliyun.com/ubuntu-releases/20.04/ jammy-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://mirrors.aliyun.com/ubuntu-releases/20.04/ jammy multiverse# deb-src http://mirrors.aliyun.com/ubuntu-releases/20.04/ jammy multiversedeb http://mirrors.aliyun.com/ubuntu-releases/20.04/ jammy-updates multiverse# deb-src http://mirrors.aliyun.com/ubuntu-releases/20.04/ jammy-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://mirrors.aliyun.com/ubuntu-releases/20.04/ jammy-backports main restricted universe multiverse# deb-src http://mirrors.aliyun.com/ubuntu-releases/20.04/ jammy-backports main restricted universe multiversedeb http://security.ubuntu.com/ubuntu/ jammy-security main restricted# deb-src http://security.ubuntu.com/ubuntu/ jammy-security main restricteddeb http://security.ubuntu.com/ubuntu/ jammy-security universe# deb-src http://security.ubuntu.com/ubuntu/ jammy-security universedeb http://security.ubuntu.com/ubuntu/ jammy-security multiverse# deb-src http://security.ubuntu.com/ubuntu/ jammy-security multiverse这样镜像源就更换成功了！
最后，更新软件源
apt-get update