ifconfig

修改网卡的配置文件，缺省选项和参数是查看激活状态的网卡信息

$ ifconfigeth0      Link encap:Ethernet  HWaddr b8:88:e3:e9:1f:2d            UP BROADCAST MULTICAST  MTU:1500  Metric:1          RX packets:0 errors:0 dropped:0 overruns:0 frame:0          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0          collisions:0 txqueuelen:1000           RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)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:65536  Metric:1          RX packets:20102 errors:0 dropped:0 overruns:0 frame:0          TX packets:20102 errors:0 dropped:0 overruns:0 carrier:0          collisions:0 txqueuelen:0           RX bytes:1897763 (1.8 MB)  TX bytes:1897763 (1.8 MB)wlan0     Link encap:Ethernet  HWaddr e0:06:e6:cd:f8:cf            inet addr:192.168.1.111  Bcast:192.168.1.255  Mask:255.255.255.0          inet6 addr: fe80::e206:e6ff:fecd:f8cf/64 Scope:Link          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1          RX packets:11539 errors:0 dropped:3 overruns:0 frame:0          TX packets:7005 errors:0 dropped:0 overruns:0 carrier:0          collisions:0 txqueuelen:1000           RX bytes:3352856 (3.3 MB)  TX bytes:891096 (891.0 KB)

说明：

eth0, wlan0 #网卡名

lo 主机环回地址

Link encap#连接类型

HWaddr #HardWareaddress，即MAC地址

inet addr #ip地址

Bcast #广播地址

Mask #子网掩码

命令格式$ifconfig [网卡名] [选项] [参数]

add [地址] #设置ip地址

del [地址] #删除ip地址

up #启动网络设备