在java代码中使用linux指令

@Test
    public  void linuxCommand() throws Exception {
        try {
          //执行的linux指令
            String cmd = "uname -m";
            String[] cmdA = {"/bin/sh", "-c", cmd};
            Process process = Runtime.getRuntime().exec(cmdA);
            process.waitFor();
            LineNumberReader br = new LineNumberReader(new InputStreamReader(
                    process.getInputStream()));
            StringBuilder sb = new StringBuilder();
            String line;
            while ((line = br.readLine()) != null) {
                sb.append(line).append("\n");
            }
            //获取结果
            System.out.println(sb.toString().trim());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }