disable eth0 网卡

ifconfig eth0 down

enable eth0 网卡

ifconfig eth0 up

以下可以查看网卡连接的状态及速度

 [root@sdb1 ~]# ethtool eth0
Settings for eth0:
        Supported ports: [ TP ]
        Supported link modes:   1000baseT/Full 
                               10000baseT/Full 
        Supports auto-negotiation: No
        Advertised link modes:  Not reported
        Advertised auto-negotiation: No
        Speed: 10000Mb/s
        Duplex: Full
        Port: Twisted Pair
        PHYAD: 0
        Transceiver: internal
        Auto-negotiation: off
        Supports Wake-on: uag
        Wake-on: d
        Link detected: yes


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