linux檢查網卡是否正常的方法：1、通過“mii-tool”指令查看網卡狀態；2、通過“network status”查看網絡狀態；3、通過“ifconfig -a”命令查看linux中所有網絡接口的信息；4、通過“ethtool”命令查詢網卡信息即可。
本教程操作環境：linux5.9.8系統、Dell G3電腦。
linux怎么檢查網卡是否正常？
查看Linux下網卡狀態或 是否連接
1) 通過mii-tool指令
???????[root@localhost?root]#?mii-tool ????????eth0:?negotiated?100baseTx-FD,?link?ok ????????eth1:?no?link
? ? ? ?或
??????[root@localhost?root]#?mii-tool?-v ????????eth0:?negotiated?100baseTx-FD,?link?ok ??????????product?info:?vendor?00:50:43,?model?2?rev?3 ??????????basic?mode:???autonegotiation?enabled ??????????basic?status:?autonegotiation?complete,?link?ok ??????????capabilities:?100baseTx-FD?100baseTx-HD?10baseT-FD?10baseT-HD ??????????advertising:?100baseTx-FD?100baseTx-HD?10baseT-FD?10baseT-HD?flow-control ??????????link?partner:?100baseTx-FD?100baseTx-HD?10baseT-FD?10baseT-HD ????????eth1:?no?link ??????????product?info:?vendor?00:50:43,?model?2?rev?3 ??????????basic?mode:???autonegotiation?enabled ??????????basic?status:?no?link ??????????capabilities:?100baseTx-FD?100baseTx-HD?10baseT-FD?10baseT-HD ??????????advertising:?100baseTx-FD?100baseTx-HD?10baseT-FD?10baseT-HD?flow-control
? ? ? ?或
??????[root@localhost?root]#?mii-tool?-w ???????21:20:33?eth0:?negotiated?100baseTx-FD,?link?ok ???????21:20:33?eth1:?no?link ??????//mii-tool主要是用于配置網卡工作模式的指令，同時也可以進行查詢、監控等工作！
??
? ?2)
?????[root@localhost?/]#?/etc/init.d/network?status ??????Configured?devices: ??????lo?eth0?eth1 ??????Currently?active?devices: ??????lo?eth0
? ? ?等同于
?????[root@localhost?root]#?service?--status-all ??????............ ??????............ ??????Configured?devices: ??????lo?eth0?eth1 ??????Currently?active?devices: ??????lo?eth0 ??????............ ??????............
? ?3)ifconfig -a
????[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
4)ethtool
#ethtool?eth0 Settings?for?eth0: ????????Supported?ports:?[?MII?] ????????Supported?link?modes:???10baseT/Half?10baseT/Full ????????????????????????????????100baseT/Half?100baseT/Full ????????????????????????????????1000baseT/Half?1000baseT/Full ????????Supports?auto-negotiation:?Yes ????????Advertised?link?modes:?10baseT/Half?10baseT/Full ????????????????????????????????100baseT/Half?100baseT/Full ????????????????????????????????1000baseT/Half?1000baseT/Full ????????Advertised?auto-negotiation:?Yes ????????Speed:?100Mb/s ????????Duplex:?Full ????????Port:?Twisted?Pair ????????PHYAD:?1 ????????Transceiver:?internal ????????Auto-negotiation:?on ????????Supports?Wake-on:?g ????????Wake-on:?d ????????Current?message?level:?0x000000ff?(255) ????????Link?detected:?yes #ethtool?eth1 Settings?for?eth1: ????????Supported?ports:?[?MII?] ????????Supported?link?modes:???10baseT/Half?10baseT/Full ????????????????????????????????100baseT/Half?100baseT/Full ????????????????????????????????1000baseT/Half?1000baseT/Full ????????Supports?auto-negotiation:?Yes ????????Advertised?link?modes:?10baseT/Half?10baseT/Full ????????????????????????????????100baseT/Half?100baseT/Full ????????????????????????????????1000baseT/Half?1000baseT/Full ????????Advertised?auto-negotiation:?Yes ????????Speed:?Unknown!?(0) ????????Duplex:?Half ????????Port:?Twisted?Pair ????????PHYAD:?1 ????????Transceiver:?internal ????????Auto-negotiation:?on ????????Supports?Wake-on:?g ????????Wake-on:?d ????????Current?message?level:?0x000000ff?(255) ????????Link?detected:?no
從上面可以看出eth0 處于連接狀態，eth1沒有連接
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