Get OS Name and create folder and file to linux server/ Operating system

This program is to get the server details using System.getProperty() , and then make a folder in Linux OS. I am making a folder inside the /tmp folder.

public class ReadWriteFile {

public static void main(String[] args) throws IOException {

String osName = System.getProperty("os.name");

Map sysP = System.getProperties();

String tm = System.getProperty("java.io.tmpdir");

File file = new File(tm+"/abc");

File ff= new File(file+"/abdc.txt");

if(osName.startsWith("Linux")){

System.out.println("Linux sysy");

}

if(!file.exists()){

file.mkdirs();

}else{

ff.createNewFile();

}

System.out.println(osName+" "+file.getPath());

System.out.println(tm);

System.out.println(sysP);

}