  $ radosgw-admin --help
  usage: radosgw-admin <cmd> [options...]
  commands:
    user create                create a new user
    user modify                modify user
    user info                  get user info
    user rm                    remove user
    user suspend               suspend a user
    user enable                re-enable user after suspension
    user check                 check user info
    user stats                 show user stats as accounted by quota subsystem
    caps add                   add user capabilities
    caps rm                    remove user capabilities
    subuser create             create a new subuser
    subuser modify             modify subuser
    subuser rm                 remove subuser
    key create                 create access key
    key rm                     remove access key
    bucket list                list buckets
    bucket link                link bucket to specified user
    bucket unlink              unlink bucket from specified user
    bucket stats               returns bucket statistics
    bucket rm                  remove bucket
    bucket check               check bucket index
    object rm                  remove object
    object unlink              unlink object from bucket index
    objects expire             run expired objects cleanup
    period prepare             prepare a new period
    period delete              delete a period
    period get                 get period info
    period get-current         get current period info
    period pull                pull a period
    period push                push a period
    period list                list all periods
    period update              update the staging period
    period commit              commit the staging period
    quota set                  set quota params
    quota enable               enable quota
    quota disable              disable quota
    realm create               create a new realm
    realm delete               delete a realm
    realm get                  show realm info
    realm get-default          get default realm name
    realm list                 list realms
    realm list-periods         list all realm periods
    realm remove               remove a zonegroup from the realm
    realm rename               rename a realm
    realm set                  set realm info (requires infile)
    realm default              set realm as default
    realm pull                 pull a realm and its current period
    zonegroup add              add a zone to a zonegroup
    zonegroup create           create a new zone group info
    zonegroup default          set default zone group
    zonegroup delete           delete a zone group info
    zonegroup get              show zone group info
    zonegroup modify           modify an existing zonegroup
    zonegroup set              set zone group info (requires infile)
    zonegroup remove           remove a zone from a zonegroup
    zonegroup rename           rename a zone group
    zonegroup list             list all zone groups set on this cluster
    zonegroup-map get          show zonegroup-map
    zonegroup-map set          set zonegroup-map (requires infile)
    zone create                create a new zone
    zone delete                delete a zone
    zone get                   show zone cluster params
    zone modify                modify an existing zone
    zone set                   set zone cluster params (requires infile)
    zone list                  list all zones set on this cluster
    zone rename                rename a zone
    pool add                   add an existing pool for data placement
    pool rm                    remove an existing pool from data placement set
    pools list                 list placement active set
    policy                     read bucket/object policy
    log list                   list log objects
    log show                   dump a log from specific object or (bucket + date
                               + bucket-id)
                               (NOTE: required to specify formatting of date
                               to "YYYY-MM-DD-hh")
    log rm                     remove log object
    usage show                 show usage (by user, date range)
    usage trim                 trim usage (by user, date range)
    gc list                    dump expired garbage collection objects (specify
                               --include-all to list all entries, including unexpired)
    gc process                 manually process garbage
    metadata get               get metadata info
    metadata put               put metadata info
    metadata rm                remove metadata info
    metadata list              list metadata info
    mdlog list                 list metadata log
    mdlog trim                 trim metadata log (use start-date, end-date or
                               start-marker, end-marker)
    mdlog status               read metadata log status
    bilog list                 list bucket index log
    bilog trim                 trim bucket index log (use start-marker, end-marker)
    datalog list               list data log
    datalog trim               trim data log
    datalog status             read data log status
    opstate list               list stateful operations entries (use client_id,
                               op_id, object)
    opstate set                set state on an entry (use client_id, op_id, object, state)
    opstate renew              renew state on an entry (use client_id, op_id, object)
    opstate rm                 remove entry (use client_id, op_id, object)
    replicalog get             get replica metadata log entry
    replicalog update          update replica metadata log entry
    replicalog delete          delete replica metadata log entry
    orphans find               init and run search for leaked rados objects (use job-id, pool)
    orphans finish             clean up search for leaked rados objects
  options:
     --tenant=<tenant>         tenant name
     --uid=<id>                user id
     --subuser=<name>          subuser name
     --access-key=<key>        S3 access key
     --email=<email>
     --secret/--secret-key=<key>
                               specify secret key
     --gen-access-key          generate random access key (for S3)
     --gen-secret              generate random secret key
     --key-type=<type>         key type, options are: swift, s3
     --temp-url-key[-2]=<key>  temp url key
     --access=<access>         Set access permissions for sub-user, should be one
                               of read, write, readwrite, full
     --display-name=<name>
     --max_buckets             max number of buckets for a user
     --system                  set the system flag on the user
     --bucket=<bucket>
     --pool=<pool>
     --object=<object>
     --date=<date>
     --start-date=<date>
     --end-date=<date>
     --bucket-id=<bucket-id>
     --shard-id=<shard-id>     optional for mdlog list
                               required for: 
                                 mdlog trim
                                 replica mdlog get/delete
                                 replica datalog get/delete
     --metadata-key=<key>      key to retrieve metadata from with metadata get
     --remote=<remote>         zone or zonegroup id of remote gateway
     --period=<id>             period id
     --epoch=<number>          period epoch
     --commit                  commit the period during 'period update'
     --master                  set as master
     --master-url              master url
     --master-zonegroup=<id>   master zonegroup id
     --master-zone=<id>        master zone id
     --rgw-realm=<realm>       realm name
     --realm-id=<realm id>     realm id
     --realm-new-name=<realm new name> realm new name
     --rgw-zonegroup=<zonegroup>   zonegroup name
     --zonegroup-id=<zonegroup id> zonegroup id
     --rgw-zone=<zone>         name of zone in which radosgw is running
     --zone-id=<zone id>       zone id
     --zone-new-name=<zone>    zone new name
     --source-zone             specify the source zone (for data sync)
     --default                 set entity (realm, zonegroup, zone) as default
     --read-only               set zone as read-only (when adding to zonegroup)
     --endpoints=<list>        zone endpoints
     --fix                     besides checking bucket index, will also fix it
     --check-objects           bucket check: rebuilds bucket index according to
                               actual objects state
     --format=<format>         specify output format for certain operations: xml,
                               json
     --purge-data              when specified, user removal will also purge all the
                               user data
     --purge-keys              when specified, subuser removal will also purge all the
                               subuser keys
     --purge-objects           remove a bucket's objects before deleting it
                               (NOTE: required to delete a non-empty bucket)
     --sync-stats              option to 'user stats', update user stats with current
                               stats reported by user's buckets indexes
     --show-log-entries=<flag> enable/disable dump of log entries on log show
     --show-log-sum=<flag>     enable/disable dump of log summation on log show
     --skip-zero-entries       log show only dumps entries that don't have zero value
                               in one of the numeric field
     --infile=<file>           specify a file to read in when setting data
     --state=<state string>    specify a state for the opstate set command
     --replica-log-type        replica log type (metadata, data, bucket), required for
                               replica log operations
     --categories=<list>       comma separated list of categories, used in usage show
     --caps=<caps>             list of caps (e.g., "usage=read, write; user=read"
     --yes-i-really-mean-it    required for certain operations
     --reset-regions           reset regionmap when regionmap update
  
  <date> := "YYYY-MM-DD[ hh:mm:ss]"
  
  Quota options:
     --bucket                  specified bucket for quota command
     --max-objects             specify max objects (negative value to disable)
     --max-size                specify max size (in B/K/M/G/T, negative value to disable)
     --quota-scope             scope of quota (bucket, user)
  
  Orphans search options:
     --pool                    data pool to scan for leaked rados objects in
     --num-shards              num of shards to use for keeping the temporary scan info
     --orphan-stale-secs       num of seconds to wait before declaring an object to be an orphan (default: 86400)
     --job-id                  set the job id (for orphans find)
     --max-concurrent-ios      maximum concurrent ios for orphans find (default: 32)
  
    --conf/-c FILE    read configuration from the given configuration file
    --id/-i ID        set ID portion of my name
    --name/-n TYPE.ID set name
    --cluster NAME    set cluster name (default: ceph)
    --setuser USER    set uid to user or uid (and gid to user's gid)
    --setgroup GROUP  set gid to group or gid
    --version         show version and quit
  
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