public void saveToLibDir(ByteBuffer byteBuffer, String fileName) throws IOException {
    String destination = this.libRoot + File.separator + fileName;
    saveToDir(byteBuffer, destination);
  }
@param byteBuffer file
@param fileName The name of the file. Absolute Path will be libRoot + File_Separator + fileName
iotdb-core/node-commons/src/main/java/org/apache/iotdb/commons/executable/ExecutableManager.java