阿里云os CentOS7.6

https://mirrors.aliyun.com/centos-vault/centos/7.6.1810/isos/x86_64/

https://developer.aliyun.com/mirror/centos?spm=a2c6h.13651102.0.0.2df11b11ju130W

阿里云os版本：

Kernel: Linux 3.10.0-957.21.3.el7.x86_64

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

yum makecache