as this path said (http://caffe.berkeleyvision.org/gathered/examples/imagenet.html)
We assume that you already have downloaded the ImageNet training data and validation data, and they are stored on your disk like:
/path/to/imagenet/train/n01440764/n01440764_10026.JPEG
/path/to/imagenet/val/ILSVRC2012_val_00000001.JPEG
now my question is:how to download the imagenet training data