linux 系統查看網卡是否連接

方法一： ifconfig 

[root@localhost ~]# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0C:29:5A:03:D0 
          inet addr:192.168.1.8  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe5a:3d0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:90931 errors:0 dropped:0 overruns:0 frame:0
          TX packets:77139 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:8985535 (8.5 MiB)  TX bytes:6054556 (5.7 MiB)

 

如果是link 證明有網線連接

 

方法二： mii-tool

[root@localhost ~]# mii-tool
eth0: negotiated 100baseTx-FD, link ok
eth1: no link

 

這種方法更直觀 直接顯示網卡是否連接