把主机名称修改为admin03
[root@admin03 ~]# hostnamectl set-hostname admin03
[root@admin03 ~]# setenforce 0 [root@admin03 ~]# sed -i "s/SELINUX=enforcing/SELINUX=permissive/g" /etc/selinux/config [root@admin03 ~]# systemctl disable firewalld.service
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