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ifconfig.md

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  如何查看IP地址？
  Windows上是ipconfig，Linux上是ifconfig或者ip addr。执行ip addr可以看到如下输出：

root@test:~# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether fa:16:3e:c7:79:75 brd ff:ff:ff:ff:ff:ff
    inet 10.100.122.2/24 brd 10.100.122.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::f816:3eff:fec7:7975/64 scope link 
       valid_lft forever preferred_lft forever

  这个命令显示了这台机器上所有的网卡。