Windows Open a command prompt (by choosing the Command Prompt item from the Start menu, or typing cmd in the Start menu's " Run " box), and type the following: wmic bios get serialnumber MacOS Go to Utilities. Open the Terminal application and type: ioreg -l | grep IOPlatformSerialNumber Linux Open a shell and type: sudo dmidecode -t system | grep Serial Note: The user will need to have root access to the system.
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