gistfile1.txt

package processBuilderCase;

import java.io.File;

public class ProcessBuilderExample {

	public static void main(String[] args) {
		
		//create the command
		String cmd = "ps";
		
		try {
			ProcessBuilder pb = new ProcessBuilder(cmd);
			
			//redirect the output to a new file named output.txt
			pb.redirectOutput(new File("output.txt"));
			
			pb.start();//execute the command
			
		} catch(Exception ex) {
			ex.printStackTrace();
		}
		
	}
	
}