Linux mac address wifi

Как узнать MAC-адрес в Linux

В те времена, когда только проектировался Ethernet, предусматривалось применение уникального номера каждой сетевой карте, подключённой к нему. Назначался он при изготовлении платы. MAC-адрес используется для определения получателя и отправителя информации в Сети. И в этой статье речь пойдёт о том, как узнать MAC адрес в Linux.

Практически во всех операционных системах на основе ядра Linux используется две консольные утилиты, с помощью которых можно узнать аппаратный адрес карты: ifconfig и ip. Различные графические приложения этого типа используют их данные.

Как узнать MAC-адрес с помощью ifconfig

Одной из первых сетевых программ в истории Linux является ifconfig. В некоторых дистрибутивах она запускается только от имени администратора, а где-то вообще не установлена. Рассмотрим её инсталляцию и использование в Manjaro Linux.

Пакет, содержащий в себе некоторые сетевые утилиты (в том числе и ifconfig), в Manjaro- и Arch-подобных системах называется net-tools. Установим его.

А в Ubuntu- и Debian-подобных системах:

sudo apt install net-tools

Чтобы узнать MAC-адрес Linux, сначала смотрим список интерфейсов:

Доступных интерфейсов два: enp0s7 (в вашем случае он может называться по другому) и lo (он же локальный хост, который одинаков практически для всех компьютеров). Нам нужен enp0s7.

MAC-адрес устройства виден уже сейчас в поле ether, но чтобы отобразить только его, воспользуемся такой командой:

ifconfig -a | grep ether | gawk »

Здесь grep принимает на вход то, что вывела команда ifconfig -a, находит строку, где есть ether, и передаёт на вход команде gawk, которая выбирает второе слово в принятой строке.

Как посмотреть MAC-адрес с помощью ip

Более новой в системах GNU/Linux (относительно ifconfig) является программа ip. Её принцип работы практически такой же. Отличается синтаксисом и выводимой информацией. И она установлена по умолчанию для всех систем. Для отображения сетевых интерфейсов нужно ввести команду:

Здесь lo и enp0s7 расположены в обратном порядке.

Чтобы узнать MAC адрес сетевой карты Linux, вводим ту же самую конструкцию, только для этой команды:

Выводы

За то, как узнать MAC адрес в Linux, отвечают две консольные утилиты — ifconfig и ip. Первая может запускаться от имени администратора в некоторых дистрибутивах (например в Debian), а где-то вообще не быть установленной (Manjaro). Это связано с её отходом на второй план, поскольку ip является более новой программой и устанавливается по умолчанию во всех системах.

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How to Find Your MAC address in Ubuntu and Other Linux Distros

When you are learning networking or troubleshooting it, you would need to know the MAC address.

A computer can have more than one MAC address. It is because the MAC address is a core part of networking, and each networking peripheral device has its own MAC address.

So, your WiFi card has a MAC address, and so does the Ethernet (LAN) port. Even the Bluetooth has one.

The MAC address, also known as the physical address, is a 12-digit hexadecimal code (48-bits) and is represented as MM:MM:MM:SS:SS:SS

In this tutorial, I’ll share the steps for finding the MAC address of your desired networking interface in Linux. I’ll show both command line and GUI methods.

Method 1: Find MAC address using command line

There are serveral Linux networking commands that can be used to get the MAC address of the WiFi or LAN cards.

Open up your terminal and use the following command, and it will bring the address of the present network cards in your system:

And you’ll be met with the following output:

Generally, the wireless device names will be wlan0, wlan1, wlan2, wlo0, wlo1, and wlo2, whereas the Ethernet (wired device) will probably have eth0, eth1, eno0, eno1,enpls0, or enpls1.

You can find the MAC address of each device at the last line of the device description, followed by link/ether and it’s 52:54:00:5c:92:bf in my case.

Get the MAC address of Bluetooth

As I mentioned earlier, all networking devices have a physical address. If you want to see the MAC address of your Bluetooth adapter, you can use this command:

You can see it beside the BD Address field.

[email protected]:~$ hciconfig hci0: Type: Primary Bus: USB BD Address: DC:41:A9:FB:7A:C4 ACL MTU: 1021:4 SCO MTU: 96:6 UP RUNNING RX bytes:17895787 acl:275 sco:250783 events:298882 errors:0 TX bytes:303664302 acl:295384 sco:249895 commands:3380 errors:0

You can also use the bluetoothctl command here.

Method 2: Get MAC address using GUI

If you’re afraid of using the terminal you can use the network settings to get the MAC address details.

I am using Ubuntu with the GNOME desktop environment. If you use some other desktop environments, the screenshots may not look the same.

First, search for settings in the system menu and open the first result.

Now, for the left menu bar, select Network and click on the little gear icon located near to wired network toggle. Even if you’re not connected to a wired network, you can still follow the same approach.

If you’re on Wi-Fi, there will be an option for Wi-Fi in the left menu bar. From there, you have to follow the same approach (clicking on the gear icon) to get your MAC address.

Once you click on the gear icon, you’ll be met with details of the selected network interface. Here, the MAC address is given as the Hardware address.

Here you have it in the easiest way possible!

Final Words

Did you know that the first half of hexadecimal code (24 bits) is used to represent the manufacturer of your network adapter?

Finding a MAC address in Linux is quite easy as you have seen it here. On the same note, you may like to learn about changing the MAC address in Linux.

Let me know if you have any questions or suggestions.

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How to Find Network MAC Address in Linux System

The term MAC Address is a derived abbreviation for Media Access Control Address. The network interface controller (NIC) uses the MAC address as its assigned unique identifier within an existing network segment.

To practically relate to or understand what a MAC address is, think of it as the postal or physical address to a house. The house in this case is the network interface controller (NIC).

There is a key difference between MAC address and IP address and therefore we should not confuse the two. MAC address identifies the device you are using since it is imprinted on the device hardware whereas IP address identifies the connection status among devices seeking to communicate on an existing/configured network.

The MAC address of any device is represented by a 12-digit hexadecimal number. Its display includes a colon or hyphen after every two MAC address digits for easy readability.

For instance, a MAC address can be represented in the following manner.

aa:bb:cc:dd:ee:ff or gg-hh-ii-jj-kk-ll

Approaches to Finding MAC Address in Linux

Depending on the number of network interfaces on your Linux machine like Wi-Fi built-in and Ethernet port, your computer can be associated with more than one MAC Address.

1. Find Linux System Mac Address Using IP Command

The ip command is part of the iproute2 package and can be used to display both the MAC address and IP address of your Linux-powered machine using either of the following commands.

$ ip addr or $ ip address or $ ip address show

Depending on the network adapter or interface present, we can see the availed MAC addresses. In the above screen capture, three distinct MAC addresses can be identified from the ip address command.

Another useful command is the ip link which only focuses on the MAC address and does not display the IP addresses.

2. Find Linux System Mac Address Using Ifconfig Command

The ifconfig command is another effective approach to identifying the MAC address of your Linux machine. We however need to install it first since it is a member of the net-tools package and not installed on Linux by default.

$ sudo apt install net-tools [On Debian, Ubuntu and Mint] $ sudo yum install net-tools [On RHEL/CentOS/Fedora and Rocky Linux/AlmaLinux] $ sudo emerge -a sys-apps/net-tools [On Gentoo Linux] $ sudo pacman -S net-tools [On Arch Linux] $ sudo zypper install net-tools [On OpenSUSE]

Once installed, run the ifconfig command to find the IP address and MAC address of your Linux system.

Different network interfaces or adapters showcase different MAC addresses as highlighted in the above screen capture.

We have successfully defined and understood how to get the MAC address(es) on our Linux machines.

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Get MAC address of a network access point [duplicate]

Though this question has been marked as a duplicate, the accepted answer here is what gave me the info I needed. The highest ranked answer on the linked question gives me more info than I need, which didn’t let me figure out which of the two MAC addresses my printer was listing belonged to the SSID my laptop is connected to. If there’s ever a cleanup of duplicates, perhaps the answers can be merged?

2 Answers 2

• arping 192.168.0.1 Change the IP adress to whatever you use. The MAC address is in the reply between brackets.
• iwconfig | grep «Access Point» . Access point will be colored and behind it the MAC address.
• iwlist wlan0 scan | grep Address same as previous command (color etc).

The iwlist option gives me a message saying the interface doesn’t support scanning; the arping option gives me what is probably a cached version of the wired connection I unplugged. Happily, the iwconfig option gives me the info I needed.

If you are using a recent desktop version of Ubuntu (with interfaces managed by network-manager ) then nmcli is a more configurable option than nm-tool . For example, to list some common information including SSID, access point MAC (BSSID), channel frequency, signal strength etc. for all the access points seen by the active wifi device you can use

You can limit the output to specific fields e.g. to see just the access point MAC addresses (BSSIDs) and connection status, use

nmcli -f BSSID,ACTIVE dev wifi list 

To return just the MAC address to which the wifi device is currently connected (i.e. the access point whose ACTIVE field is ‘yes’), you can use

nmcli -f BSSID,ACTIVE dev wifi list | awk '$2 ~ /yes/ ' 

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