ethtool Commands and Examples

1. What is Ethtool command?
2. How does Ethtool command work?
3. What is Ethtool used for?
4. How does Ethtool change speed?
5. How do you set speed and duplex?
6. What is Iwconfig command in Linux?
7. How do I set my Ethernet to full duplex?
8. How do you solve a duplex mismatch?
9. How do I list network adapters in Linux?
10. Where does Ethtool get its information?
11. Is Ethtool deprecated?
12. What is Ethtool Ubuntu?

What is Ethtool command?

Ethtool is a Network Interface Card configuration command that allows you to retrieve information and change your NIC settings. These settings include Speed, Duplex, Auto-Negotiation, and many other parameters.

How does Ethtool command work?

The ethtool command retrieves the status of the Ethernet interface. The output displays properties like speed, duplex, status and wake on of the etho interface. There are three types of duplexes: ... Auto negotiation: On the basis of the network connection, the Ethernet interface decides whether to use full or half duplex.

What is Ethtool used for?

ethtool is a networking utility on Linux. It is used to configure Ethernet devices on Linux. ethtool can also be used to find a lot of information about connected Ethernet devices on your Linux computer.

How does Ethtool change speed?

To change Speed and Duplex of an ethernet card, we can use ethtool – a Linux utility for Displaying or Changing ethernet card settings.

1. Install ethtool. ...
2. Get the Speed, Duplex and other information for the interface eth0. ...
3. Change the Speed and Duplex settings. ...
4. Change the Speed and Duplex settings Permanently on CentOS/RHEL.

How do you set speed and duplex?

Configuring Speed and Duplex in Microsoft* Windows*

1. Navigate to the Device Manager.
2. Open Properties on the adapter you would like to configure.
3. Click the Link Speed tab.
4. Select the appropriate speed and duplex from the Speed and Duplex pull down menu.
5. Click OK.

What is Iwconfig command in Linux?

iwconfig command in Linux is like ifconfig command, in the sense it works with kernel-resident network interface but it is dedicated to wireless networking interfaces only. It is used to set the parameters of the network interface that are particular to the wireless operation like SSID, frequency etc.

How do I set my Ethernet to full duplex?

Right-click on Ethernet and then select Properties. Click Configure. Click the Advanced tab and set the Ethernet card Speed & Duplex settings to 100 Mbps Full Duplex. Note: The option in the Property field may be named Link Speed & Duplex or just Speed & Duplex.

How do you solve a duplex mismatch?

A duplex mismatch can be fixed by either enabling autonegotiation (if available and working) on both ends or by forcing the same settings on both ends (availability of a configuration interface permitting).

How do I list network adapters in Linux?

HowTo: Linux Show List Of Network Cards

1. lspci command : List all PCI devices.
2. lshw command : List all hardware.
3. dmidecode command : List all hardware data from BIOS.
4. ifconfig command : Outdated network config utility.
5. ip command : Recommended new network config utility.
6. hwinfo command : Probe Linux for network cards.

Where does Ethtool get its information?

1 Answer. ethtool gets the statistics using the SIOCETHTOOL ioctl, which takes a pointer to struct ethtool_stats . To get the statistics, the cmd field of the struct should have the value ETHTOOL_GSTATS .

Is Ethtool deprecated?

Since 2003, it's considered obsolete and replaced by ethtool.

What is Ethtool Ubuntu?

ethtool is used to query and control network device driver and hardware settings, particularly for wired Ethernet devices. devname is the name of the network device on which ethtool should operate.