linux使用命令设置IP，DNS，网关

临时修改

root # ifconfig eth0 192.168.1.10                                           #设置ip

root # route add default gw 192.168.1.1                                #设置默认网关

root # echo nameserver 192.168.1.1 > /etc/resolv.conf         #设置域名服务器（DNS）

修改配置文件永久修改

在linux系统中，网络设备的配置文件保存在“/etc/sysconfig/network-scripts”目录下，ifcfg-eth0包含第一块网卡的配置信息，ifcfg-eth1包含第二块网卡的配置信息

vi /etc/sysconfig/network-scripts/ifcfg-eth0 修改第一块网卡信息

DEVICE="eth0"                                                                                  #设备名称

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

HWADDR="08:00:27:59:30:24"                                                         #网卡硬件地址

IPADDR=192.168.1.11                                                                      #网卡IP地址

NM_CONTROLLED="yes"                                                                 #设备eth0是否可以由Network Manager图形管理工具托管(修改)

IPV6INIT=NO                                                                                    #ipv6初始化

ONBOOT="yes"                                                                                #启动时是否激活网卡

TYPE="Ethernet"                                                                              #类型（以太网）

UUID="689263a8-2627-4bc6-9415-9334e81b3537"                     #唯一标识

NETMASK=255.255.255.0                                                                #网卡网络地址

BROADCAST=192.168.1.255                                                            #网卡广播地址

修改域名服务器

vim /etc/resolv.conf                                                               

nameserver 114.114.114.114

nameserver 8.8.8.8

修改网络名和默认网关

vim /etc/sysconfig/network

NETWORKING=yes                                                                            #是否启用网络

HOSTNAME=CentOS                                                                          #主机名

GATEWAY=192.168.0.1                                                                    #网关

修改完成后重启网络服务:service network restart