第1种方法
[root@localhost /]# ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:09:6B:09:08:FC
inet addr:192.168.10.1 Bcast:192.168.10.255 Mask:255.255.255.0
inet6 addr: fe80::209:6bff:fe09:8fc/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:106732953 errors:0 dropped:0 overruns:0 frame:0
TX packets:104379788 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:2351331877 (2.1 GiB) TX bytes:391707945 (373.5 MiB)
Base address:0x2500 Memory:fbfe0000-fc000000
eth1 Link encap:Ethernet HWaddr 00:09:6B:09:08:FD
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)
Base address:0x2540 Memory:fbfc0000-fbfe0000
[root@localhost /root]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:19:DB:41:08:1B
inet addr:211.100.10.235 Bcast:211.100.10.235 Mask:255.255.255.255
UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
RX packets:178812 errors:0 dropped:0 overruns:0 frame:0
TX packets:153415 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:33094019 (31.5 MiB) TX bytes:71911163 (68.5 MiB)
Base address:0x8f00 Memory:fd6e0000-fd700000
eth1 Link encap:Ethernet HWaddr 00:19:DB:41:08:1C
inet addr:192.168.1.115 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:13805 errors:0 dropped:0 overruns:0 frame:0
TX packets:11356 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1520439 (1.4 MiB) TX bytes:5406527 (5.1 MiB)
Base address:0x7f00 Memory:fd2e0000-fd300000
eth2 Link encap:Ethernet HWaddr 00:19:DB:41:08:1D
inet addr:202.194.99.62 Bcast:202.194.99.62 Mask:255.255.255.255
UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
RX packets:158024 errors:0 dropped:0 overruns:0 frame:0
TX packets:182280 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:74748049 (71.2 MiB) TX bytes:33535454 (31.9 MiB)
Base address:0xdf00 Memory:fdee0000-fdf00000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:99 errors:0 dropped:0 overruns:0 frame:0
TX packets:99 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:12978 (12.6 kiB) TX bytes:12978 (12.6 kiB)
第二种方法,通过mii-tool指令
[root@localhost root]# mii-tool -w
21:20:33 eth0: negotiated 100baseTx-FD, link ok
21:20:33 eth1: no link
第三种方法
ethtool eth0
Settings for eth0:
Link detected: yes
http://hi.baidu.com/nan5715077/blog/item/4bd02f071b5f01ca7a8947cd.html
FAQ:如何查看Linux下网卡是否连接(UP)?