Get System Motherboard Serial Number of Linux or Windows based Machine: This java program will get and print the Motherboard Serial Number of Linux or Windows Operating System based Machines.

package com.includehelp;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileWriter;
import java.io.InputStreamReader;

/**
 * Program to get System Motherboard Serial Number for Windows and Linux Machine
 * @author includehelp
 */
public class SystemMotherBoardNumber {
    
    /** 
     * Method for get System Motherboard Serial Number
     * @return  MAC Address
     */
    public static String getSystemMotherBoard_SerialNumber(){
        try{
            String OSName=  System.getProperty("os.name");
            if(OSName.contains("Windows")){
                return (getWindowsMotherboard_SerialNumber());
            }
            else{
                return (GetLinuxMotherBoard_serialNumber());
            }
        }
        catch(Exception E){
            System.err.println("System MotherBoard Exp : "+E.getMessage());
            return null;
        }
    }
    
    /**
     * Method for get Windows Machine MotherBoard Serial Number
     * @return 
     */
    private static String getWindowsMotherboard_SerialNumber() {
        String result = "";
        try {
            File file = File.createTempFile("realhowto",".vbs");
            file.deleteOnExit();
            FileWriter fw = new java.io.FileWriter(file);

            String vbs =
            "Set objWMIService = GetObject("winmgmts:\\\\.\\root\\cimv2")\n"
              + "Set colItems = objWMIService.ExecQuery _ \n"
              + "   ("Select * from Win32_BaseBoard") \n"
              + "For Each objItem in colItems \n"
              + "    Wscript.Echo objItem.SerialNumber \n"
              + "    exit for  ' do the first cpu only! \n"
              + "Next \n";

            fw.write(vbs);
            fw.close();

            Process p = Runtime.getRuntime().exec("cscript //NoLogo " + file.getPath());
            BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream()));
            String line;
            while ((line = input.readLine()) != null) {
               result += line;
            }
            input.close();
        }
        catch(Exception E){
             System.err.println("Windows MotherBoard Exp : "+E.getMessage());
        }
        return result.trim();
    } 
    
    
    /**
     * Method for get Linux Machine MotherBoard Serial Number
     * @return 
     */
    private static String GetLinuxMotherBoard_serialNumber() {
        String command = "dmidecode -s baseboard-serial-number";
        String sNum = null; 
        try {   
            Process SerNumProcess = Runtime.getRuntime().exec(command);
            BufferedReader sNumReader = new BufferedReader(new InputStreamReader(SerNumProcess.getInputStream()));
            sNum = sNumReader.readLine().trim();
            SerNumProcess.waitFor();
            sNumReader.close();
        }
        catch (Exception ex) {
            System.err.println("Linux Motherboard Exp : "+ex.getMessage());
            sNum =null;
        }
        return sNum; 
    }
    
    public static void main(String[] args) {
        String motherBoard_SerialNumber = getSystemMotherBoard_SerialNumber();
        System.out.println("MotherBoard Serial Number : "+motherBoard_SerialNumber);
    }
   
}

Output

MotherBoard Serial Number : TFFWB10WB0P4AF