先用ifconfig来查看所有活动网络接口 eth0 Link encap:Ethernet HWaddr b8:27:eb:1b:63:a8 inet addr:192.168.1.6 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::6502:67ff:89b:b2fd/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:43239 errors:0 dropped:24 overruns:0 frame:0 TX packets:30644 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:25068614 (23.9 MiB) TX bytes:5993030 (5.7 MiB) 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:1961 errors:0 dropped:0 overruns:0 frame:0 TX packets:1961 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1 RX bytes:160232 (156.