Linux教程：ifconfig 使用

ifconfig

修改網卡的配置文件，缺省選項和參數是查看激活狀態的網卡信息

$ ifconfig
eth0      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)

說明：
eth0, wlan0 #網卡名
lo 主機環回地址
Link encap#連接類型
HWaddr #HardWareaddress，即MAC地址
inet addr #ip地址
Bcast #廣播地址
Mask #子網掩碼
$ifconfig [網卡名] [選項] [參數]
add [地址] #設置ip地址
del [地址] #刪除ip地址
up #啟動網絡設備
down #關閉網絡設備
hw [設備類型] [硬件地址] # 設置網絡設備的類型與硬件地址
irq[IRQ地址] # 設置網絡設備的IRQ
netmask [子網掩碼] # 設置子網掩碼
broadcast [廣播地址] # 設置廣播地址