Last Updated on Monday, 28 December 2009 11:43 Tuesday, 21 April 2009 17:00

Q:  How can I tell what speed a network interface is using in Linux?

A:  Ethtool is a simple command for this, for example:

ethtool eth0

Ethtool can also be used to set duplex, speed, autonegotiation, and other network interface settings, both for ethernet ETH and wireless WLAN devices.