1
$ systemctl stop firewalld && systemctl disable firewalld
2
$ setenforce 0
3
$ sed -i 's/SELINUX=.*/SELINUX=disabled/' /etc/selinux/config

1
$ mv /etc/yum.repos.d/* /media/
2
$ curl -o /etc/yum.repos.d/aliyun.repo http://mirrors.aliyun.com/repo/Centos-8.repo
3
$ yum clean all && yum makecache