[root@localhost ~]# cat /etc/redhat-release 
CentOS Linux release 7.6.1810 (Core)

[root@localhost ~]# cd /etc/sysconfig/network-scripts/
[root@localhost network-scripts]# vi ifcfg-ens160
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=ens160
UUID=c7e9416b-47bf-4360-95a0-96038e78fe40
DEVICE=ens160
ONBOOT=yes
IPADDR=172.16.4.243
NETMASK=255.255.252.0
GATEWAY=172.16.7.254

查看防火墙状态
systemctl status firewalld.service
关闭防火墙
systemctl stop firewalld.service
打开防火墙
systemctl start firewalld.service

[root@localhost ~]# vi /etc/sysconfig/selinux


# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
#     enforcing - SELinux security policy is enforced.
#     permissive - SELinux prints warnings instead of enforcing.
#     disabled - No SELinux policy is loaded.
SELINUX=disabled

 # SELINUXTYPE= can take one of three values: # targeted - Targeted processes are protected, # minimum - Modification of targeted policy. Only selected processes are protected. # mls - Multi Level Security protection. SELINUXTYPE=targeted