ethtool

ethtool
Original author(s)	David S. Miller
Developer(s)	Ben Hutchings
Initial release	1998 (1998)
Written in	C
Operating system	Linux
Type	Utility program
License	GNU GPL v2
Website	www.kernel.org/pub/software/network/ethtool/

ethtool is a utility for Linux kernel-based operating system for displaying and modifying some parameters of network interface controllers (NICs) and their device drivers. ethtool is developed parallel to the Linux kernel.

Usage

The command is useful for

Identification and diagnosis of Ethernet devices
Extended Ethernet devices statistics
Control speed, duplex, auto-negotiation and flow control for Ethernet devices
Control checksum offload and other hardware offload features
Control DMA ring sizes and interrupt moderation
Control receive queue selection for multiqueue devices
Upgrade firmware in flash memory

Example

To display the current parameters:

$ ethtool eth0
Settings for eth0:
       Supported ports: [ TP MII ]
       Supported link modes:   10baseT/Half 10baseT/Full
                               100baseT/Half 100baseT/Full
       Supports auto-negotiation: Yes
       Advertised link modes:  10baseT/Half 10baseT/Full
                               100baseT/Half 100baseT/Full
       Advertised auto-negotiation: No
       Speed: 100Mb/s
       Duplex: Full
       Port: MII
       PHYAD: 1
       Transceiver: internal
       Auto-negotiation: off
       Supports Wake-on: g
       Wake-on: g
       Current message level: 0x00000007 (7)
       Link detected: yes

External links

Unix command-line interface programs and shell builtins

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Shell builtins	alias echo expr printf sleep test true and false unset wait yes

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List of Unix utilities

ethtool

Usage

Example

See also

External links