StringBuffer buf = new StringBuffer(1000);            try {                Process pos = Runtime.getRuntime().exec("sh " + cmd);                pos.waitFor();                InputStreamReader ir = new InputStreamReader(pos.getInputStream());                LineNumberReader input = new LineNumberReader(ir);                String ln="";                while ((ln =input.readLine()) != null) {                    buf.append(ln+"
");                }                logger.info(buf.toString());                input.close();                ir.close();            } catch (Exception e) {                logger.error("###flush Kerberos command error:" + e);            }