ethtool
Display and modify Network Interface Controller (NIC) parameters. tldr-pages
On Linux
Linux
Display the current settings for an interface
ethtool eth0IdentifyDisplay the driver information for an interface
ethtool --driver eth0IdentifyDisplay all supported features for an interface
ethtool --show-features eth0IdentifyDisplay the network usage statistics for an interface
ethtool --statistics eth0IdentifyBlink one or more LEDs on an interface for 10 seconds
ethtool --identify eth0 10IdentifySet the link speed, duplex mode, and parameter auto-negotiation for a given interface
ethtool --change eth0 speed 10 duplex half autoneg onIdentify