1、编辑 ifcfg-eth0 文件，vim 最小化安装时没有被安装，需要自行安装不描述。

#vim/etc/sysconfig/network-scripts/ifcfg-eth0

2、修改如下内容

BOOTPROTO="static"#dhcp改为static
ONBOOT="yes"#开机启用本配置
IPADDR=172.16.13.40#静态IP
GATEWAY=172.16.13.254#默认网关
NETMASK=255.255.255.0#子网掩码
DNS1=172.16.10.1#DNS配置

3、修改后效果

#]#cat/etc/sysconfig/network-scripts/ifcfg-eth0
HWADDR="00:15:5D:07:F1:02"
TYPE="Ethernet"
BOOTPROTO="static"#dhcp改为static
DEFROUTE="yes"
PEERDNS="yes"
PEERROUTES="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_PEERDNS="yes"
IPV6_PEERROUTES="yes"
IPV6_FAILURE_FATAL="no"
NAME="eth0"
UUID="bb3a302d-dc46-461a-881e-d46cafd0eb71"
ONBOOT="yes"#开机启用本配置
IPADDR=172.16.13.40#静态IP
GATEWAY=172.16.13.254#默认网关
NETMASK=255.255.255.0#子网掩码
DNS1=172.16.10.1#DNS配置

4、重启下网络服务

#servicenetworkrestart

5、查看改动后的效果，Centois 7 不再使用 ifconfig 而是用 ip 命令查看网络信息。

#ipaddr
1:lo:<LOOPBACK,UP,LOWER_UP>mtu65536qdiscnoqueuestateUNKNOWN
link/loopback00:00:00:00:00:00brd00:00:00:00:00:00
inet127.0.0.1/8scopehostlo
valid_lftforeverpreferred_lftforever
inet6::1/128scopehost
valid_lftforeverpreferred_lftforever
2:eth0:<BROADCAST,MULTICAST,LOWER_UP>mtu1500qdiscpfifo_faststateUNKNOWNqlen1000
link/ether00:15:5d:07:f1:02brdff:ff:ff:ff:ff:ff
inet172.16.13.40/24brd172.16.13.255scopeglobaleth0
valid_lftforeverpreferred_lftforever
inet6fe80::215:5dff:fe07:f102/64scopelink
valid_lftforeverpreferred_lftforever