s3cmd [-c CONFIGFILE] ls s3://CONFIGFILE | Configuration file. Defaults to $HOME/.s3cfg |
Example
List all buckets on the server, specifying the root path of all buckets (s3://) and specifying our configuration file as the non default vast.s3cfg.
$ s3cmd -c vast.s3cfg ls s3://
2019-06-24 09:55 s3://bucket1