md/ubuntu-sources-22.04.md

备份 source.list 文件

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

vim /etc/apt/sources.list

复制粘贴

deb http://mirrors.aliyun.com/ubuntu/ jammy main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ jammy-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ jammy-backports main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ jammy-security main restricted universe multiverse

更新

apt update

升级现有软件包（可选）

apt upgrade

修改 PPA 和第三方源（如果有的话）

/etc/apt/sources.list.d/

替换 ppa 文件的URL，一般将 ppa.launchpad.net 修改为 ppa.mirrors.aliyun.com

deb http://ppa.mirrors.aliyun.com/ppa/username/repositoryname/ jammy main