private void  cleanExe(String cmd){
		Session session;
		try {
			session = conn.openSession();
			session.execCommand(cmd);
			InputStream	in = new StreamGobbler(session.getStdout());
			BufferedReader br = new BufferedReader(new InputStreamReader(in));
			String line = "";
			while((line=br.readLine())!=null){
				if(line.startsWith("clean"))
					break;
			}
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}