redhat7.9阿里源404解决方法

阿里云镜像下载

 curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

华为云镜像下载

 curl -o /etc/yum.repos.d/CentOS-Base.repo https://repo.huaweicloud.com/repository/conf/CentOS-7-anon.repo

解决方案

sed -i 's/$releasever/7/g' /etc/yum.repos.d/CentOS-Base.repo
#清除缓存
yum clean all
yum makecache