1）selinux(system1和system2）

[root@system1 ~]# ll /etc/selinux/config

[root@system1 ~]# setenforce 1

[root@system1 ~]# vi /etc/selinux/config

[root@system1 ~]# grep -i ^selinux /etc/selinux/config

SELINUX=enforcing

SELINUXTYPE=targeted

[root@system2 ~]# vi /etc/selinux/config

[root@system1 ~]# setenforce 1

[root@system2 ~]# grep -i ^selinux /etc/selinux/config

SELINUX=enforcing

SELINUXTYPE=targeted