cd /etc/yum.repos.d/ && mkdir backup && mv *repo backup/2、下载源文件
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-8.repo3、更新源里面的地址
sed -i -e "s|mirrors.cloud.aliyuncs.com|mirrors.aliyun.com|g " /etc/yum.repos.d/CentOS-* sed -i -e "s|releasever|releasever-stream|g" /etc/yum.repos.d/CentOS-*4、生成缓存
yum clean all && yum makecache
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