ethtool

Additional Notes

ethtool is a network command used to display or change Ethernet device settings. It queries and controls network adapter settings such as link speed, duplex mode, auto-negotiation, and offload features. Changes do not persist across reboots unless configured elsewhere.

Syntax

ethtool [options] interface

Parameters

• options: Flags that change how ethtool behaves.
• interface: Network interface name (e.g., eth0).

Common Options

• --help: Show command help when supported.
• --version: Show version information when supported.

Examples

ethtool --help
man ethtool

Practical Notes

Options can vary by distribution and package version. Use man ethtool, ethtool --help, or the package documentation for exact syntax.