hdfs[Command] Dfsadmin

Usage:java Dfsadmin
Note:administrative commands can only is run as the HDFS Superuser.
[-report]
[-safemode Enter | leave | get | wait]
[-allowsnapshot <snapshotdir>]
[-disallowsnapshot <snapshotdir>]
[-savenamespace]
[-rolledits]
[-restorefailedstorage True|false|check]
[-refreshnodes]
[-finalizeupgrade]
[-rollingupgrade [<query|prepare|finalize>]]
[-metasave filename]
[-refreshserviceacl]
[-refreshusertogroupsmappings]
[-refreshsuperusergroupsconfiguration]
[-printtopology]
[-refreshnamenodes Datanodehost:port]
[-deleteblockpool datanode-host:port Blockpoolid [Force]]
[-setquota <quota> <dirname>...<dirname>]
[-clrquota <dirname>...<dirname>]
[-setspacequota <quota> <dirname>...<dirname>]
[-clrspacequota <dirname>...<dirname>]
[-setbalancerbandwidth <bandwidth in bytes per Second>]
[-fetchimage <local Directory>]
[-shutdowndatanode <datanode_host:ipc_port> [upgrade]]
[-getdatanodeinfo <datanode_host:ipc_port>]
[-help [CMD]]

hdfs[Command] Dfsadmin