Centos系列更换Yum源办法

阿里网站：repo安装包下载_开源镜像站-阿里云 (aliyun.com)

Centos Stream 8

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mkdir repo.bak
mv /etc/yum.repos.d/* repo.bak/
wget -O /etc/yum.repos.d/CentOS-Stream-AppStream.repo https://mirrors.aliyun.com/repo/centos-stream/8/CentOS-Stream-AppStream.repo
wget -O /etc/yum.repos.d/CentOS-Stream-BaseOS.repo https://mirrors.aliyun.com/repo/centos-stream/8/CentOS-Stream-BaseOS.repo
dnf clean all && dnf makecache

Centos 7

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mkdir repo.bak
mv /etc/yum.repos.d/* repo.bak/
wget -O /etc/yum.repos.d/Centos-7.repo https://mirrors.aliyun.com/repo/Centos-7.repo
yum clean all && yum makecache

Centos 8

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mkdir repo.bak
mv /etc/yum.repos.d/* repo.bak/
curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo
yum clean all && yum makecache
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