1. 备份系统源
cd /etc/yum.repos.d/ && mkdir backup && mv *repo backup/
2. 下载源
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-8.repo
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-*
3. 重建缓存
yum clean all && yum makecache
4. 测试安装
yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm
yum install htop
