Что выдаёт ifconfig?
ifconfig
eth0 Link encap:Ethernet HWaddr 00:0e:2e:a4:13:81
inet6 addr: fe80::20e:2eff:fea4:1381/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:979 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:58923 (58.9 KB) TX bytes:1836 (1.8 KB)
Interrupt:23 Base address:0xdc00
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:16436 Metric:1
RX packets:52 errors:0 dropped:0 overruns:0 frame:0
TX packets:52 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:3288 (3.2 KB) TX bytes:3288 (3.2 KB)