备份源文件

<code>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 universe

deb 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 multiverse

deb 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 multiverse

deb http://security.ubuntu.com/ubuntu/ jammy-security main restricted

# deb-src http://security.ubuntu.com/ubuntu/ jammy-security main restricted

deb http://security.ubuntu.com/ubuntu/ jammy-security universe

# deb-src http://security.ubuntu.com/ubuntu/ jammy-security universe

deb http://security.ubuntu.com/ubuntu/ jammy-security multiverse

# deb-src http://security.ubuntu.com/ubuntu/ jammy-security multiverse

root@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.list

root@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 universe

deb 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 multiverse

deb 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 multiverse

deb http://security.ubuntu.com/ubuntu/ jammy-security main restricted

# deb-src http://security.ubuntu.com/ubuntu/ jammy-security main restricted

deb http://security.ubuntu.com/ubuntu/ jammy-security universe

# deb-src http://security.ubuntu.com/ubuntu/ jammy-security universe

deb 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