原文链接：https://www.cnblogs.com/arvintang/p/5990599.html

网络接口配置文件

[root@localhost ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0

# Intel Corporation 82545EM Gigabit Ethernet Controller (Copper)

TYPE=Ethernet #网卡类型

DEVICE=eth0 #网卡接口名称

ONBOOT=yes #系统启动时是否自动加载

BOOTPROTO=static #启用地址协议 --static:静态协议 --bootp协议 --dhcp协议

IPADDR=192.168.1.11 #网卡IP地址

NETMASK=255.255.255.0 #网卡网络地址

GATEWAY=192.168.1.1 #网卡网关地址

DNS1=10.203.104.41 #网卡DNS地址

HWADDR=00:0C:29:13:5D:74 #网卡设备MAC地址

BROADCAST=192.168.1.255 #网卡广播地址

重新导入ifcfg-eth0网络配置文件

[root@localhost ~]# /etc/init.d/network reload

Shutting down interface eth0: [ OK ]

Shutting down loopback interface: [ OK ]

Bringing up loopback interface: [ OK ]

Bringing up interface eth0: [ OK ]

网卡接口关闭与激活

[root@localhost ~]# ifdown eth0 #关闭网络

[root@localhost ~]# ifup eth0 #启动网络

网络服务启动与关闭

方法一:

[root@localhost ~]# service network stop #关闭网络服务

[root@localhost ~]# service network start #启动网络服务

[root@localhost ~]# service network restart #重启网络服务

方法二：

[root@localhost ~]# /etc/init.d/network stop

[root@localhost ~]# /etc/init.d/network start

[root@localhost ~]# /etc/init.d/network restart

网卡状态查询

[root@localhost ~]# service network status

Configured devices:

lo eth0

Currently active devices:

lo eth0

临时配置网卡信息，无需重启。

[root@localhost ~]# ifconfig eth0 10.1.1.10 netmask 255.0.0.0

查看网卡接口信息，默认列出所有接口

[root@localhost ~]# ifconfig

eth0 Link encap:Ethernet HWaddr 00:0C:29:13:5D:74

inet addr:192.168.1.11 Bcast:192.168.1.255 Mask:255.255.255.0

inet6 addr: fe80::20c:29ff:fe13:5d74/64 Scope:Link

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

RX packets:413 errors:0 dropped:0 overruns:0 frame:0

TX packets:572 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:47701 (46.5 KiB) TX bytes:64842 (63.3 KiB)

Base address:0x2000 Memory:d8920000-d8940000

lo Link encap:Local Loopback

inet addr:127.0.0.1 Mask:255.0.0.0

inet6 addr: ::1/128 Scope:Host

UP LOOPBACK RUNNING MTU:16436 Metric:1

RX packets:407 errors:0 dropped:0 overruns:0 frame:0

TX packets:407 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:0

RX bytes:70759 (69.1 KiB) TX bytes:70759 (69.1 KiB)

查看当前路由及网关信息

[root@localhost ~]# netstat -r

Kernel IP routing table

Destination Gateway Genmask Flags MSS Window irtt Iface

192.168.1.0 * 255.255.255.0 U 0 0 0 eth0

169.254.0.0 * 255.255.0.0 U 0 0 0 eth0

default 192.168.1.1 0.0.0.0 UG 0 0 0 eth0

DNS：

主机名：CentOS

主DNS：202.106.46.151

第二DNS:202.106.0.20

第三DNS:8.8.8.8

网络配置：

eth0

静态ip：192.168.1.106

子网掩码 255.255.255.0

默认网关 IP 192.168.1.1

DEVICE=eth0

IPADDR=192.168.1.106

NETMASK=255.255.255.0

BROADCAST=192.168.1.255

ONBOOT=yes

BOOTPROTO=none

GATEWAY=192.168.1.1

TYPE=Ethernet

"/etc/sysconfig/network-scripts/ifcfg-eth0" 11L, 187C