This guide facilitates the alteration of MAC addresses on Ubuntu via Terminal. It's an uncomplicated process!
Procedure

Access the Terminal.


Check your current address: type: ip link show

Deactivate the device as a precaution. Input: 'ip link set dev xxxx down' where xxxx represents the device name; for instance: ip link set dev wlan0 down

Modify your MAC address. Enter this into the terminal: ip link set dev xxxx address xx:xx:xx:xx:xx:xx where xxxx denotes the device and xx:xx:xx:xx:xx:xx represents your new MAC address. MAC addresses require hexadecimal digits (0-9 and a-f) which can be selected randomly. The command should resemble: ip link set dev wlan0 address 74:d0:3b:9f:d8:48

Configure your device accordingly: ip link set dev xxxx up, where xxxx signifies your device name
Step-by-step Guide:
Pointers
-
Altering your MAC address can be beneficial, especially if your network administrator has blocked your MAC, allowing you to circumvent it.