Home Operation and Maintenance Linux Operation and Maintenance What is the command to query mac address in Linux?

What is the command to query mac address in Linux?

Mar 10, 2023 am 10:20 AM
linux mac address

Command to query the mac address: 1. "ifconfig -a", the HWaddr field of the output result is the MAC address; 2. "cat /etc/sysconfig/network-scripts/ifcfg-eth0", read the MAC Configuration file; 3. "cat /sys/class/net/eth0/address"; 4. "dmesg | grep eth0"; 5. "cat /proc/net/arp".

What is the command to query mac address in Linux?

The operating environment of this tutorial: linux7.3 system, Dell G3 computer.

What is the mac address?

MAC (Media Access Control, media access control) is used to define the location of network devices. An identifier used to represent each site on the Internet, expressed in hexadecimal numbers, with a total of six bytes (48 bits). Among them, the first three bytes are codes (high-order 24 bits) assigned to different manufacturers by the IEEE registration authority RA, also known as "Organizationally Unique Identifier", and the last three bytes are (lower 24 bits) is assigned by each manufacturer to the adapter interface produced, called an extended identifier (uniqueness). An address block can generate 2^24 different addresses. The MAC address is actually the adapter address or adapter identifier. MAC is globally unique.

How to query the mac address in Linux

PS: Generally, the default network card file name is eth0, which can be determined based on the actual situation corresponding to the IP address. Just ethx.

1, <strong>ifconfig -a</strong> The HWaddr field is the MAC address, which is the most commonly used method

What is the command to query mac address in Linux?

2, cat /etc/sysconfig/network-scripts/ifcfg-eth0 (CentOS or Redhat configuration file)

What is the command to query mac address in Linux?

below Both types can be viewed before IP is set. Can be used to solve the problem of binding between MAC and operating system. For example, if you install the operating system to a remote server, the mac address of the operating system is the address of host A. On host B, it cannot be started remotely because the MAC address is different (because the configuration file is still the mac address of A at this time). Since the OS will detect the hardware when it starts, obtain the MAC address of the hardware, and write it to the /sys/class/net/eth0/address file, after the OS obtains the mac address, before using the original MAC configuration file (that is, /etc /sysconfig/network-scripts/ifcfg-eth0), write the real mac address into the configuration file.

3、cat /sys/class/net/eth0/address Check the MAC address of eth0

What is the command to query mac address in Linux?

4, dmesg | grep eth0

dmesg' command is very important to diagnose device faults. When performing hardware connection or disconnection operations with the help of the 'dmesg' command, we can see the hardware detection or disconnection information.

What is the command to query mac address in Linux?

5、cat /proc/net/arp View the MAC of the remote IP connected to this machine The address

cannot see the MAC of the local machine, only the remote connection, which is mostly used by the server.

What is the command to query mac address in Linux?

Recommended study: "PHP Video Tutorial"

The above is the detailed content of What is the command to query mac address in Linux?. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Roblox: Bubble Gum Simulator Infinity - How To Get And Use Royal Keys
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Nordhold: Fusion System, Explained
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Mandragora: Whispers Of The Witch Tree - How To Unlock The Grappling Hook
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Hot Topics

Java Tutorial
1666
14
PHP Tutorial
1273
29
C# Tutorial
1255
24
Linux Architecture: Unveiling the 5 Basic Components Linux Architecture: Unveiling the 5 Basic Components Apr 20, 2025 am 12:04 AM

The five basic components of the Linux system are: 1. Kernel, 2. System library, 3. System utilities, 4. Graphical user interface, 5. Applications. The kernel manages hardware resources, the system library provides precompiled functions, system utilities are used for system management, the GUI provides visual interaction, and applications use these components to implement functions.

vscode Previous Next Shortcut Key vscode Previous Next Shortcut Key Apr 15, 2025 pm 10:51 PM

VS Code One-step/Next step shortcut key usage: One-step (backward): Windows/Linux: Ctrl ←; macOS: Cmd ←Next step (forward): Windows/Linux: Ctrl →; macOS: Cmd →

How to check the warehouse address of git How to check the warehouse address of git Apr 17, 2025 pm 01:54 PM

To view the Git repository address, perform the following steps: 1. Open the command line and navigate to the repository directory; 2. Run the "git remote -v" command; 3. View the repository name in the output and its corresponding address.

How to run java code in notepad How to run java code in notepad Apr 16, 2025 pm 07:39 PM

Although Notepad cannot run Java code directly, it can be achieved by using other tools: using the command line compiler (javac) to generate a bytecode file (filename.class). Use the Java interpreter (java) to interpret bytecode, execute the code, and output the result.

How to run sublime after writing the code How to run sublime after writing the code Apr 16, 2025 am 08:51 AM

There are six ways to run code in Sublime: through hotkeys, menus, build systems, command lines, set default build systems, and custom build commands, and run individual files/projects by right-clicking on projects/files. The build system availability depends on the installation of Sublime Text.

What is the main purpose of Linux? What is the main purpose of Linux? Apr 16, 2025 am 12:19 AM

The main uses of Linux include: 1. Server operating system, 2. Embedded system, 3. Desktop operating system, 4. Development and testing environment. Linux excels in these areas, providing stability, security and efficient development tools.

laravel installation code laravel installation code Apr 18, 2025 pm 12:30 PM

To install Laravel, follow these steps in sequence: Install Composer (for macOS/Linux and Windows) Install Laravel Installer Create a new project Start Service Access Application (URL: http://127.0.0.1:8000) Set up the database connection (if required)

git software installation git software installation Apr 17, 2025 am 11:57 AM

Installing Git software includes the following steps: Download the installation package and run the installation package to verify the installation configuration Git installation Git Bash (Windows only)

See all articles