备份原有repo文件

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

下载阿里云的 CentOS 7 仓库配置

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

更新缓存

yum clean all
yum makecache

解决Centos安装SCLo-scl rh-php72-php依赖安装

sed -i 's/^mirrorlist/#&/ ;s/^# baseurl/baseurl/ ; s|http://mirror.centos.org|https://mirrors.aliyun.com|' /etc/yum.repos.d/CentOS-SCLo-scl.repo

sed -i 's/^mirrorlist/#&/ ;s/^#baseurl/baseurl/ ; s|http://mirror.centos.org|https://mirrors.aliyun.com|' /etc/yum.repos.d/CentOS-SCLo-scl-rh.repo