查看“Centos7.x配置网络”的源代码

=解说=
<pre>
cat /etc/sysconfig/network-scripts/ifcfg-enp6s0

#添加如下内容
BOOTPROTO=static #启用静态IP地址 
IPADDR0=192.168.88.10 #设置IP地址 
NETMASK=255.255.255.0  #设置子网掩码
GATEWAY0=192.168.88.1 #设置网关 
DNS1=8.8.8.8 #设置主DNS 
DNS2=114.114.114.114 #设置备DNS

DEVICE=enp0s3
ONBOOT=yes


cat /etc/resolv.conf 
# Generated by NetworkManager
nameserver 192.168.88.1
nameserver 192.168.53.1

#重启网络
service network restart


#othre 
TYPE="Ethernet"
BOOTPROTO=static  
IPADDR0=192.168.0.9
NETMASK=255.255.255.0  
GATEWAY0=192.168.0.1 
DNS1=8.8.4.4  
DNS2=114.114.114.114 

DEVICE="eth0"
ONBOOT="yes"

</pre>
=eg=
<pre>
cat /etc/sysconfig/network-scripts/ifcfg-eth0 

TYPE="Ethernet"
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"
#UUID="ff71d3b7-aa7d-4ac5-a3ca-87e867fe2a64"
DEVICE="eth0"
ONBOOT="yes"
DNS1="223.5.5.5"
DOMAIN="223.5.5.5"
IPADDR="192.168.88.50"
PREFIX="24"
GATEWAY="192.168.88.1"
IPV6_PEERDNS="yes"
IPV6_PEERROUTES="yes"
IPV6_PRIVACY="no"



</pre>

=dns client=
<pre>
1. /etc/sysconfig/network-scripts/ifcfg-eth0
DNS1="223.6.6.6"

#前面这个优先级比较高  其实上面不要写上dns更加清爽
2./etc/resolv.conf
</pre>
=troubleshooting=
PREFIXO0=24  #设置子网掩码 会导致连上不外网

=参考=

[https://www.cnblogs.com/panblack/p/Centos7_Static_Routes.html Centos7添加静态路由]

[https://www.cnblogs.com/panblack/p/Centos7-WhatsNew-02-networking.html Centos7系统配置上的变化（二）网络管理基础]

[https://man.linuxde.net/route route命令]

[https://www.cnblogs.com/snake-hand/p/3143041.html  linux route命令的使用详解 ]


[https://blog.csdn.net/God_luck/article/details/83548090  路由跟踪(tracert、traceroute)简析]

[https://blog.csdn.net/MichealwlfBBLF/article/details/71330194 centos 7配置静态IP，并配置DNS]


[https://blog.csdn.net/jcxch/article/details/48632761 centos 7 网络配置（ 网关、dns、ip地址配置）]

[https://blog.csdn.net/xmroom/article/details/69055193 Centos7 网络配置 设置静态Ip]