Change the MAC Address on PC Linux OS and CentOS

What is a MAC address?

A MAC (Media Access Control) address is a unique identifier for network interfaces. It is a 48-bit number (12 hexadecimal characters). The network card on your system has a built-in, unique address called the MAC address. The Address Resolution Protocol (ARP) maps an IP address (Network Layer – Layer 3) to a MAC Address (Data Link Layer – Layer 2).

An organizationally unique identifier (OUI) is a 24-bit number that uniquely identifies the manufacturer of the network card.

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