[root@Su /]# vim /etc/selinux/config


# 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.
##此处disabled为永久关闭selinux，需要重启生效
SELINUX=disabled    
# SELINUXTYPE= can take one of three two values:
#     targeted - Targeted processes are protected,
#     minimum - Modification of targeted policy. Only selected processes are protected. 
#     mls - Multi Level Security protection.
SELINUXTYPE=targeted

#临时关闭selinux ：setenforce 0
#查看selinux状态：getenforce
 

关闭防火墙

[root@Su /]# systemctl stop firewalld       ##关闭防火墙
[root@Su /]# systemctl disable firewalld     ##禁止开机启动
Removed symlink /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
[root@Su /]# 

#systemctl enable firewalld     ##开机启动
 

关闭NetworkManager

[root@Su ~]# systemctl stop NetworkManager
[root@Su ~]# systemctl disable NetworkManager

删除UUID（eth0|eth1），并修改IP

[root@Su ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0

TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=none
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=eth0
DEVICE=eth0
ONBOOT=yes
IPADDR=10.0.0.40                 ####修改IP
PREFIX=24
GATEWAY=10.0.0.2
DNS1=223.5.5.5
IPV6_PRIVACY=no

配置yum源（根据以下说明）
https://developer.aliyun.com/mirror/centos?spm=a2c6h.13651102.0.0.53322f70HiNd4M  （阿里源）
https://mirrors.tuna.tsinghua.edu.cn/help/centos/    （清华源）