1、ethtool：query or control network driver and hardware settings
1）简介：ethtool用于查询和控制网络设备驱动和硬件（特别是有线的以太网设备）的设置。
2）选项：-i：查询指定设备的驱动信息；-S：查询指定设备的统计信息（rx_packets、rx_bytes等）；只指定设备时，打印其当前设置：
[root@localhost ~]# ethtool ens33
Settings for ens33:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Speed: 1000Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
MDI-X: off (auto)
Supports Wake-on: d
Wake-on: d
Current message level: 0x00000007 (7)
drv probe link
Link detected: yes
不断学习中。。。
原文：http://www.cnblogs.com/hanerfan/p/5385156.html