模板制作时centos8可以选择最小化安装

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selinux:

vi /etc/selinux/config

SELINUX=enabled 改为 SELINUX=disabled

reboot生效

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防火墙：

关闭：systemctl stop firewalld.service

禁用：systemctl disable firewalld.service

查看状态：systemctl status firewalld.service

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centos8开启NeworkManager.service服务