Talking about new API, one could use the following commands to download required data (it seems that Kaggle official API doesn’t support listing file names in single command for now):
COMPETITION=planet-understanding-the-amazon-from-space
DATA=/home/user/data/kaggle/planet # your path to data
kaggle competitions download -c $COMPETITION -f train-jpg.tar.7z -p $DATA
kaggle competitions download -c $COMPETITION -f test-jpg.tar.7z -p $DATA
kaggle competitions download -c $COMPETITION -f test-jpg-additional.tar.7z -p $DATA
kaggle competitions download -c $COMPETITION -f train_v2.csv.zip -p $DATA
kaggle competitions download -c $COMPETITION -f test_v2_file_mapping.csv.zip -p $DATA
kaggle competitions download -c $COMPETITION -f sample_submission_v2.csv.zip -p $DATA