Enter Mii-tool to see if the network cable is connected to the network card
#mii-tool
- eth0:negotiated 100basetx-fd, link ok
Sometimes the driver may not support an error with the following errors
#mii-tool
- Siocgmiiphy on ' eth0 ' failed:operation not supported
- No MII interfaces found
You can use Ethtool to view
#ethtool eth0
- Settings for eth0:
- Supported ports: [TP]
- Supported Link Modes:10baset/half 10baset/full
- 100baset/half 100baset/full
- 1000baset/full
- Supports Auto-negotiation:yes
- Advertised Link Modes:10baset/half 10baset/full
- 100baset/half 100baset/full
- 1000baset/full
- Advertised Auto-negotiation:yes
- speed:100mb/s
- Duplex:full
- Port:twisted Pair
- phyad:0
- Transceiver:internal
- Auto-negotiation:on
- Supports WAKE-ON:PUMBG
- Wake-on:g
- Current message level:0x00000033 (51)
- Link Detected:yes
Link Detected:yes to normal no for failure
Transferred from: http://blog.sina.com.cn/s/blog_406127500101iffg.html
Use Mii-tool and Ethtool under Linux to see if the network cable is properly connected to the network card