ubuntu@juju-beis0-machine-5:~$ sudo radosgw-admin --help | grep list
  bucket list                list buckets
  period list                list all periods
  realm list                 list realms
  realm list-periods         list all realm periods
  zonegroup list             list all zone groups set on this cluster
  zone list                  list all zones set on this cluster
  pools list                 list placement active set
  log list                   list log objects
  gc list                    dump expired garbage collection objects (specify
                             --include-all to list all entries, including unexpired)
  metadata list              list metadata info
  mdlog list                 list metadata log
  bilog list                 list bucket index log
  datalog list               list data log
  opstate list               list stateful operations entries (use client_id,
   --shard-id=<shard-id>     optional for mdlog list
   --endpoints=<list>        zone endpoints
   --categories=<list>       comma separated list of categories, used in usage show
   --caps=<caps>             list of caps (e.g., "usage=read, write; user=read"
ubuntu@juju-beis0-machine-5:~$ sudo radosgw-admin --help | grep region
   --reset-regions           reset regionmap when regionmap update