How to check the LAN card?

Linux and Unix-Like Linux
1

Hi.

   I have a lan card installed on my server. I want to check the duplex speed of it. How can I check it?

Help is appreciated.

Thank you.

2

please discribe the details of your system and OS

ifcongif -all might help you.

techbravo

3

ethtool(8) - Linux man page

4 
# ethtool eth0
Settings for eth0:
        Supported ports: [ TP 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 auto-negotiation: Yes
        Speed: 100Mb/s
        Duplex: Full
        Port: MII
        PHYAD: 1
        Transceiver: internal
        Auto-negotiation: on
        Supports Wake-on: g
        Wake-on: d
        Current message level: 0x00000007 (7)
        Link detected: yes