aws commands

To list all folders:
aws s3 ls s3://bkt --recursive | tr -s ' ' | cut -d ' ' -f4- | grep "\/$" | sed 's/\/$//'

To list all files:
aws s3 ls s3://bkt --recursive | tr -s ' ' | cut -d ' ' -f4- | grep -v /$

To list all .json files:
aws s3 ls s3://bkt --recursive | tr -s ' ' | cut -d ' ' -f4- | grep ".json$"

To list all .json and all .yaml files:
aws s3 ls s3://bkt --recursive | tr -s ' ' | cut -d ' ' -f4- | grep -E "(.yaml|.json)$"

To list all files except .json files:
aws s3 ls s3://bkt --recursive | tr -s ' ' | cut -d ' ' -f4- | grep -v ".json$"