Ethtool eth: A Guide to the Linux Ethernet Tool340

Introduction

Ethtool is a powerful Linux command-line utility that provides detailed information about network interfaces. It can be used to diagnose and troubleshoot network issues, as well as to fine-tune network performance. In this article, we will focus on the ethtool eth command, which provides information about Ethernet interfaces.

Getting Started

To use ethtool eth, you must first have superuser privileges. You can either log in as root or use the sudo command to run ethtool with elevated privileges. For example:```
sudo ethtool eth0
```

Replace eth0 with the name of the Ethernet interface you want to examine.

Basic Information

The ethtool eth command provides a wealth of information about an Ethernet interface. The most basic information includes:*

Link status: Whether the interface is up or down.*

Speed: The current speed of the interface, in bits per second.*

Duplex: Whether the interface is running in half-duplex or full-duplex mode.*

MTU: The maximum transmission unit, which is the maximum size of a packet that can be sent over the interface.

Advanced Information

In addition to the basic information, ethtool eth can also provide more advanced information, such as:*

Driver information: The name and version of the driver that is being used by the interface.*

Statistics: Detailed statistics about the interface, including the number of packets sent and received, as well as the number of errors.*

Offloading: Information about which offloading features are enabled on the interface. Offloading can improve performance by allowing the hardware to handle certain tasks instead of the CPU.*

Coalescing: Information about which coalescing features are enabled on the interface. Coalescing can improve performance by reducing the number of interrupts that are generated by the interface.

Troubleshooting

Ethtool eth can be a valuable tool for troubleshooting network issues. For example, you can use ethtool eth to:*

Check the link status: If the link status is down, it could be a sign of a physical problem with the network cable or the network interface.*

Check the speed: If the speed is not what you expect, it could be a sign that the network cable is not capable of supporting the desired speed.*

Check the duplex: If the duplex is set to half-duplex, it could be causing performance problems. Half-duplex mode is typically only used on older networks.*

Check the MTU: If the MTU is too small, it could be causing packets to be fragmented. Fragmentation can reduce performance.

Fine-Tuning Performance

Ethtool eth can also be used

2024-12-20

Previous：ETH as a Settlement Layer

Next：UNI Coin: Understanding Its Utility and Value