Identify what network port is eth0 ?
You have two network cables plug in the back of a server and you want to know which one is eth0? Use the following command and the interface light will start blinking (for 10 seconds) on the chosen adapter.
# ethtool -p eth0 10
This command can be run without disturbing the traffic on the interface.
Categories: Network
Great tip! I’ve got to try this! I could have used it quite a few times already. Its always a gamble when you ask a remote technician to pull a cable from the back of a server