模板制作時centos8可以選擇最小化安裝
---------------------------------------------------------
selinux:
vi /etc/selinux/config
SELINUX=enabled 改為 SELINUX=disabled
reboot生效
----------------------------------------------------------
防火牆：
關閉：systemctl stop firewalld.service
禁用：systemctl disable firewalld.service
查看狀態：systemctl status firewalld.service
-----------------------------------------------------------
centos8開啟NeworkManager.service服務