tldr/pages/linux/ethtool.md

ethtool

Display and modify Network Interface Controller (NIC) parameters. More information: http://manned.org/ethtool.

• Display the current settings for an interface:

ethtool {{eth0}}

• Display the driver information for an interface:

ethtool --driver {{eth0}}

• Display all supported features for an interface:

ethtool --show-features {{eth0}}

• Display the network usage statistics for an interface:

ethtool --statistics {{eth0}}

• Blink one or more LEDs on an interface for 10 seconds:

ethtool --identify {{eth0}} {{10}}

• Set the link speed, duplex mode, and parameter auto-negotiation for a given interface:

ethtool -s {{eth0}} speed {{10|100|1000}} duplex {{half|full}} autoneg {{on|off}}