ethtool

ethtool 功能说明：查询或设置网卡参数。
 
[root@testdb62 ~]# ethtool ens160
Settings for ens160:
    Supported ports: [ TP ]
    Supported link modes:   1000baseT/Full    # 支持的网卡
                            10000baseT/Full 
    Supported pause frame use: No
    Supports auto-negotiation: No
    Supported FEC modes: Not reported
    Advertised link modes:  Not reported
    Advertised pause frame use: No
    Advertised auto-negotiation: No
    Advertised FEC modes: Not reported
    Speed: 10000Mb/s    #  从这行我们可以看出网卡是千M还是百M
    Duplex: Full        # Full是全双工，如果是 Half就是 半双工。
    Port: Twisted Pair
    PHYAD: 0
    Transceiver: internal
    Auto-negotiation: off
    MDI-X: Unknown
    Supports Wake-on: uag
    Wake-on: d
    Link detected: yes