Name node is in safe mode. Not able to leave

root# bin/hadoop fs -mkdir t
mkdir: org.apache.hadoop.hdfs.server.namenode.SafeModeException: Cannot create directory /user/root/t. Name node is in safe mode.

not able to create anything in hdfs

I did

root# bin/hadoop fs -safemode leave

But showing

safemode: Unknown command

what is the problem?

Solution: http://unmeshasreeveni.blogspot.com/2014/04/name-node-is-in-safe-mode-how-to-leave.html?m=1

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