Linux系统下的网络配置

一、修改配置文件,重启后设置不丢失

【Red Hat Linux/CentOS】

使用ifconfig查看使用的网口:

[root@localhost /]# ifconfig

修改对应网口配置文件:

[root@localhost /]# vi /etc/sysconfig/network-scripts/ifcfg-ens192

TYPE=Ethernet

BOOTPROTO=static

DEFROUTE=yes

PEERDNS=yes

IPV4_FAILURE_FATAL=no

IPV6INIT=no

IPV6_AUTOCONF=yes

IPV6_DEFROUTE=yes

IPV6_PEERDNS=yes

IPV6_PEERROUTES=yes

IPV6_FAILURE_FATAL=no

IPV6_ADDR_GEN_MODE=stable-privacy

NAME=ens192

UUID=dcb6f08a-1e19-44fe-9427-479fcebc1cd3

DEVICE=ens192

ONBOOT=yes

IPADDR=10.8.3.40

NETMASK=255.255.255.0

GATEWAY=10.8.3.254

IPV6_PEERDNS=yes

IPV6_PEERROUTES=yes

IPV6_PRIVACY=no

DNS1=10.8.1.2

重新启动网卡:

[root@localhost network-scripts]# service network restart

【Ubuntu】

使用ifconfig查看使用的网口:

[root@localhost /]# ifconfig

修改配置网口文件:

root@ubuntu14:/# vi /etc/network/interfaces

#This file describes the network interfaces available on your system

#and how to activate them. For more information, see interfaces(5).


#The loopback network interface

auto lo

iface lo inet loopback


#The primary network interface

#This is an autoconfigured IPv6 interface

auto eth1

iface eth1 inet static

address 10.8.3.105

netmask 255.255.255.0

gateway 10.8.3.254

修改DNS:

root@ubuntu14:/etc# vi /etc/resolv.conf

#Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)

#DO NOT EDIT THIS FILE BY HAND – YOUR CHANGES WILL BE OVERWRITTEN

nameserver 10.8.1.25

nameserver 8.8.8.8

重新启动网卡:

root@ubuntu14:/etc# service networking restart

二、命令修改,重启后设置丢失

ifconfig命令只能在root用户下执行

[root@localhost /]# ifconfig eth0 10.8.3.159 netmask 255.255.255.0

[root@localhost /]#route add default gw 10.8.3.254

三、其他命令使用

1)关闭或者重启网口

[root@localhost /]# ifconfig eth0 down

[root@localhost /]# ifconfig eth0 up

2)查看路由表

root@ubuntu14:/# netstat -rn

Kernel IP routing table

Destination Gateway Genmask Flags MSS Window irtt Iface

0.0.0.0 10.8.3.254 0.0.0.0 UG 0 0 0 eth1

10.8.3.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1

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