A Media Access Control address (MAC address) is a unique identifier assigned to a network interface controller (NIC). It is used to identify the device on a network and to control access to the network. MAC addresses are typically written in hexadecimal format, with six octets separated by colons, for example, “00:11:22:33:44:55”.
There are several ways to check the MAC address of a Linux system. One common method is to use the ifconfig command. This command will display information about all of the network interfaces on the system, including their MAC addresses. For example, the following command will display the MAC address of the eth0 interface: