Purpose

ethtool is a Linux program that controls the parameters of your network card.
In Euphony it is mostly used to lower the default network speed from 1000Mbps to 100Mbps.

Lowering network speeds should benefit SQ as there is less interference with lower speeds.

Bear in mind that if your library is on network attached drive that your access will be slower (buffering will take longer).

Usage

The example for the purpose of lowering the network speed is in placeholder text:

-s eth0 speed 100 duplex full autoneg off

This is the equivalent of entering this command into Linux shell:

ethtool -s eth0 speed 100 duplex full autoneg off

The logic is simple - for any desired ethtool command, enter all parameters without entering ethtool command itself.

Risk level

Using the above command is fairly safe but if you want to use some other ethtool possibilities you must know that ethtool command is extremely powerful - you can potentially write to EEPROM of your Nuc mobo!
(Why would you do that you ask? Well, to change network card led blinking behavior - like one of our customers suggested!)

If you enter a command that will by error sever your network connection on clicking Apply you will not be able to erase that command anymore - it will be remembered and executed again on reboot - severing your connection after every startup. You will have to reinstall Euphony.