Primary means in Linux kernel-based operating systems for displaying and modifying the parameters of network interface controllers and their associated device driver software from application programs running in userspace.


    Looking interface problems

    ethtool -S enp2s1
    NIC statistics:
         tx_packets: 72761
         rx_packets: 81459
         tx_errors: 0
         rx_errors: 0
         rx_missed: 0
         align_errors: 0
         tx_single_collisions: 0
         tx_multi_collisions: 0
         unicast: 76717
         broadcast: 3938
         multicast: 804
         tx_aborted: 0
         tx_underrun: 0


    ethtool -m enp2s1

    Informations (driver, firmware, supported operations)

    ethtool -i enp2s1

    Change MAC address

    ethtool -s enp2s1 phyad 42:21:10:05:02:00

    Change the speed

    ethtool -s enp2s1 speed 1000 duplex full autoneg on