Some of the CLI libraries that can be used to access s3 buckets are described below:

• s3cmd (it works only for private buckets)

  s3cmd ls s3://seviri.meteosat-10.level-15.native/testcampaign/

  after configuring the remote to use (s3cmd --configure and follow the interactive configuration for a new remote)

• rclone (works for public and private buckets after configuration)

  rclone ls s3://seviri.meteosat-10.level-15.native/testcampaign/

   after configuring a remote s3 with the endpoint (rclone configure and follow the interactive configuration for a new remote)

• awsclifor a private bucket:

  aws s3 ls --endpoint-url https://s3.waw3-1.cloudferro.com s3://seviri.meteosat-10.level-15.native/testcampaign/

  for a public bucket

  aws s3 ls --endpoint-url https://s3.waw3-1.cloudferro.com s3://seviri.meteosat-10.level-15.native/testcampaign/ --no-sign-request