首先安装 remi 的 yum 源:

sudo yum install epel-release
rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-7.rpm

查看是否安装成功:

ls -l /etc/yum.repos.d/remi*

清空重建 yum 缓存:

yum clean all
yum makecache

另外一个方法:

https://www.cnblogs.com/pandawan/p/11100311.html