noteDocs/centos/centos8换源.md

CentOS 8 换源，设置dnf / yum镜像

aliyun更新了centos8的说明

1、备份
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

2、下载新的CentOS-Base.repo 到/etc/yum.repos.d/
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-8.repo

3、生成缓存
yum makecache


4 配置镜像的。

cd /etc/yum.repos.d
#备份
cp CentOS-Base.repo CentOS-Base.repo.bak;
cp CentOS-AppStream.repo CentOS-AppStream.repo.bak;
cp CentOS-Extras.repo CentOS-Extras.repo.bak;

sed -i 's/mirrorlist=/#mirrorlist=/g' CentOS-Base.repo CentOS-AppStream.repo CentOS-Extras.repo;
sed -i 's/#baseurl=/baseurl=/g' CentOS-Base.repo CentOS-AppStream.repo CentOS-Extras.repo;
sed -i 's/http:\/\/mirror.centos.org/https:\/\/mirrors.aliyun.com/g' CentOS-Base.repo CentOS-AppStream.repo CentOS-Extras.repo