镜像下载、域名解析、时间同步请点击阿里云开源镜像站
CentOS
1.备份原来的源
在控制台输入mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup备份原本的源
2、下载新的 CentOS-Base.repo 到 /etc/yum.repos.d/
wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
3、非阿里云ECS用户会出现 Couldn’t resolve host ‘mirrors.cloud.aliyuncs.com’ 信息，不影响使用，可以修改配置
sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Base.repo
4、生成缓存
yum makecache
5、查看当前源
yum repolist
Ubuntu
1.备份原来的源
在控制台输入sudo cp /etc/apt/sources.list /etc/apt/source.list.bk备份原本的源
2.修改源
- 在控制台输入sudo vim /etc/apt/source.list会进入文件
- 按O即可进行插入代码，首先先将文件内的每行前面都加上#
- 接着在尾部粘贴如下代码
deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
- 按Esc可以退出插入状态，接着按出 :wq 则会在左下角出现字符，按回车则保存成功
更新源配置及系统
- 在控制台输入
sudo apt-get update
sudo apt-get upgrade
- 接着按回车即可进行更新
- 如果流程中出现这样的URL，则替换源成功。
[En]
if such a URL appears in the process, the source will be replaced successfully.*
原文链接：https://juejin.cn/post/7111738157388791822
Original: https://www.cnblogs.com/helong-123/p/16409124.html
Author: 萌褚
Title: Linux环境更换阿里源（CentOS+Ubuntu）
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