Find Your NIC Card Specifications In Linux

Q: How to find Ethernet Card Information and specifications in Linux?

To find your NIC card specifications like make, Network data speed, Drivers, WOL, MAC Address, Duplex modes, supported link modes, etc.
You can use the "ethtool" command to find these information along with eth name.

Find NIC Basic Information
[root@server ~]# ethtool eth0
Settings for eth0:
        Supported ports: [ MII ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
        Supports auto-negotiation: Yes
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
        Advertised pause frame use: No
        Advertised auto-negotiation: Yes
        Speed: 100Mb/s
        Duplex: Full
        Port: MII
        PHYAD: 1
        Transceiver: external
        Auto-negotiation: on
        Supports Wake-on: g
        Wake-on: d
        Link detected: yes

Find NIC Driver Information
[root@server ~]# ethtool -i eth0
driver: forcedeth
version: 0.64
bus-info: 0000:00:07.0

Find NIC Factory MAC Address Information
[root@server ~]# ethtool -P eth0
Permanent address: a1:b2:c3:d4:e5:f6

Test NIC Card
[root@server ~]# ethtool -t eth0
The test result is PASS
The test extra info:
link      (online/offline)       0
register  (offline)               0
interrupt (offline)               0
loopback  (offline)              0

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