地址：/etc/sysconfig/network-scripts

 

vi  /etc/sysconfig/network-scripts/ifcfg-eth0

1、固定ip配置

DEVICE=eth0

HWADDR=70:e2:84:09:64:c9

BOOTPROTO=static       #dhcp改为static

ONBOOT=yes                 #开机启用本配置

IPADDR=192.168.7.106     #静态IP

GATEWAY=192.168.7.1    #默认网关

NETMASK=255.255.255.0 #子网掩码

DNS1=192.168.7.1            #DNS 配置

2、ip自动获取

DEVICE=eth0

HWADDR=70:e2:84:09:64:c9

NM_CONTROLLED=yes   #即可生效

 ONBOOT=yes                 #开机启动

BOOTPROTO=dhcp       #自动获取

3、网卡重启

service network restart

ifconfig eth0 down / ifconfig eth0 up

ifdown eth0 / ifup eth0