In computer networks, we have the ISO/OSI standard. In a computer network, being it your home one, your work one, or the entire internet, the various devices need a way to identify themselves and others to ensure the right communication. Using the network connection details windowīefore digging into how to find it, let’s see what is the MAC on a computer network, so we’ll know better what we’re searching for.Using the terminal Command Line Interface.How to find the MAC address on Linux/Ubuntu.But I’m here to help, so keep reading and we’ll discover how to find the MAC address of your Linux, Mac, or Windows computer. We want the MAC address which is a 12 digit hexadecimal number.If you’re not too familiar with technology, finding your MAC could be a big problem. We will then use the grep command which is used to search for a specified pattern. The ifconfig command ( interface configuration) allows us to view the configuration of all the network interfaces on your system. Pre-requisites: Regular Expressions and grep command in Linux. System(command1) Second Approach using Regular expressions and ifconfig: String str1 = 'cat /sys/class/net/eth0/address' Ĭonst char *command1 = str1.c_str() //c_str() converts the string into a C-Style string (/sys/class/net/eth0/address contains the MAC address). Now we will use the cat command to display the text in this file. If you have a different interface name change the following path accordingly: /sys/class/net/eth0/address In all Linux based systems eth0 is the default network interface. We will discuss two ways to get the MAC address. Please keep in mind that you should not use a lot of system() calls in a program as they are expensive to call (resource-wise). We will be using system() call through a C++ program that directly communicates with the OS (Operating System) and allows us to use the Linux commands. It acts like a unique ID used to communicate within a network. The MAC address or Media Access Control Address is a 12 digit hexadecimal number. With the help of this tutorial, you will be able to easily find out the MAC address of your Linux device by just running a simple C++ program. In this post, we will learn how to find the MAC address of a Linux Device by using a C++ program.

Linux show mac address