Mac address on linux ubuntu

3 Ways to Find MAC Address in Ubuntu Linux

How to list MAC address on Ubuntu Linux is a commonly asked question during a Linux job interview. Here are 3 methods to get the MAC address in Ubuntu Linux. These commands are safe to run without changing anything.

1. Find MAC address on Ubuntu with ifconfig
2. Get MAC address with ip link show
3. Find MAC address from /sys

Understanding MAC address

A MAC address (media access control address) is a unique identifier assigned to a network interface controller (NIC) for use as a network address in communications within a network segment. MAC stands for Media Access Control, and each identifier is intended to be unique to a particular device.

The MAC address is tied to the Network Interface Controller (NIC), a subcomponent of the larger device.

The MAC address is a 12 digit hexadecimal number that is most often displayed with a colon or hypen separating every two digits (an octet), making it easier to read.

Example: A MAC address of 2c549188c9e3 is typically displayed as 2C:54:91:88:C9:E3 or 2c-54-91-88-c9-e3.

Find MAC address on Ubuntu with ifconfig

Ifconfig stands for “interface configuration.” It is used to view and change the configuration of the network interfaces on our system. On the latest Ubuntu version, this tool is no longer installed by default.

ens1f0: flags=4163 mtu 1500
inet 10.124.202.230 netmas 255.255.255.128 broadcast 10.124.202.255
ether 70:ca:9b:ce:67:ae txqueuelen 1000 (Ethernet)
RX packets 12187970 bytes 7390885300 (6.8 GiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 16813496 bytes 16253942714 (15.1 GiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device memory 0xb1960000-b197ffff

Get MAC address with ip link show in Ubuntu

The MAC address is the link/ether field of the output. Mostly this will be present in the second line.

2: eth0: mtu 9001 qdisc mq state UP group default qlen 1000
link/ether 02:70:b1:b1:34:a1 brd ff:ff:ff:ff:ff:ff
inet 10.0.0.224/24 brd 10.0.0.255 scope global dynamic eth0
valid_lft 2301sec preferred_lft 2301sec
inet6 fe80::70:b1ff:feb1:34a1/64 scope link
valid_lft forever preferred_lft forever

Find MAC address from /sys

Directory /sys allows us to get information about the system and its components (mostly attached and installed hardware) in a structured way.

We can get the MAC address from the file /sys/class/net/interface-name/address.

# cat /sys/class/net/eth0/address
02:70:b1:b1:34:a1

With the following command, we can get all the MAC address in the system.

$ cat /sys/class/net/*/address
34:17:eb:5d:88:7c
00:00:00:00:00:00
64:5a:04:69:50:45

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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.

Обнаружили ошибку в тексте? Сообщите мне об этом. Выделите текст с ошибкой и нажмите Ctrl+Enter.

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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 can I see my mac address on Ubuntu?

As described in the newer answer below, the modern solution is to run:

The MAC address is shown in the link/ether field.

Original Answer

Open a terminal and run ifconfig:

This answer needs to be deprecated given that the system doesn’t even come with ifconfig anymore. Someone like me looking for how to find the ip address without internet working can’t just intstall the obsolete utllity.

Use ip command instead of the outdated ifconfig

link/ether field of the output is the MAC address (Both for Wi-fi and ethernet connections, MAC address is represented by link/ether ). Mostly this will be present in the second line.

$ ip addr show 1: enp2s0: mtu 1500 qdisc mq state UP group default qlen 1000 link/ether a0:54:9f:53:b2:6e brd ff:ff:ff:ff:ff:ff 

In my case a0:54:9f:53:b2:6e is the MAC address.

On Ubuntu 20.04.02 LTS, there is no HWaddr in the output from ifconfig . Instead, look at ether :

Try ifconfig, and look at the «HWaddr».

okay, this is a very easy solution. 1/ Open a terminal 2/ ifconfig A list of network capable devices will be displayed. If you are using wireless, it usually is called wlan0, but can also be named pan0 wifi0 etc. A physical conection is most likely eth0. on the first line you will see your mac address. here is a sample of what you might see eth0 Link encap:Ethernet HWaddr 00:00:00:00:00:00

You can spoof your mac address too with macchanger (sudo aptitude install macchanger) just type man macchanger to learn more

You can also right-click on the GNOME Network Manager. There you choose connection information and the following window shows you the hardware address. See also NetworkManager at Ubuntus Wiki.

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