터미널로 zip다운로드, 압축풀기
on etc
1. 다운로드
mkdir coco
cd coco
mkdir images
cd images # coco/images/ 라는 폴더에다가 원하는 zip다운로드
wget http://images.cocodataset.org/zips/train2017.zip
wget http://images.cocodataset.org/zips/val2017.zip
wget http://images.cocodataset.org/zips/test2017.zip
wget http://images.cocodataset.org/zips/unlabeled2017.zip
2. 압축풀기
unzip train2017.zip
unzip val2017.zip
unzip test2017.zip
unzip unlabeled2017.zip
3. 기존의 zip은 삭제
rm train2017.zip
rm val2017.zip
rm test2017.zip
rm unlabeled2017.zip