hdfs dfsadmin

gistfile1.txt

## Hadoop 3.1.1. (CDP7.1.1)
$ hdfs dfsadmin
Usage: hdfs dfsadmin
Note: Administrative commands can only be run as the HDFS superuser.
	[-report [-live] [-dead] [-decommissioning] [-enteringmaintenance] [-inmaintenance]]
	[-safemode <enter | leave | get | wait>]
	[-saveNamespace [-beforeShutdown]]
	[-rollEdits]
	[-restoreFailedStorage true|false|check]
	[-refreshNodes]
	[-setQuota <quota> <dirname>...<dirname>]
	[-clrQuota <dirname>...<dirname>]
	[-setSpaceQuota <quota> [-storageType <storagetype>] <dirname>...<dirname>]
	[-clrSpaceQuota [-storageType <storagetype>] <dirname>...<dirname>]
	[-finalizeUpgrade]
	[-rollingUpgrade [<query|prepare|finalize>]]
	[-upgrade <query | finalize>]
	[-refreshServiceAcl]
	[-refreshUserToGroupsMappings]
	[-refreshSuperUserGroupsConfiguration]
	[-refreshCallQueue]
	[-refresh <host:ipc_port> <key> [arg1..argn]
	[-reconfig <namenode|datanode> <host:ipc_port> <start|status|properties>]
	[-printTopology]
	[-refreshNamenodes datanode_host:ipc_port]
	[-getVolumeReport datanode_host:ipc_port]
	[-deleteBlockPool datanode_host:ipc_port blockpoolId [force]]
	[-setBalancerBandwidth <bandwidth in bytes per second>]
	[-getBalancerBandwidth <datanode_host:ipc_port>]
	[-fetchImage <local directory>]
	[-allowSnapshot <snapshotDir>]
	[-disallowSnapshot <snapshotDir>]
	[-shutdownDatanode <datanode_host:ipc_port> [upgrade]]
	[-evictWriters <datanode_host:ipc_port>]
	[-getDatanodeInfo <datanode_host:ipc_port>]
	[-metasave filename]
	[-triggerBlockReport [-incremental] <datanode_host:ipc_port> [-namenode <namenode_host:ipc_port>]]
	[-listOpenFiles [-blockingDecommission] [-path <path>]]
	[-help [cmd]]