--To find the hadoop version
hadoop version
--HDFS report
sudo su - hdfs
hdfs dfsadmin -report
hdfs dfsadmin -report -live
hdfs dfsadmin -report -dead
--Configuration details
hdfs getconf -namenodes
hdfs getconf -confKey dfs.replication
hdfs getconf -confKey dfs.blocksize
hdfs getconf -confKey dfs.namenode.http-address
hdfs getconf -confKey yarn.resourcemanager.webapp.address
--YARN application details
yarn application -list -appStates ALL
yarn application -list -appStates FAILED
--Other YARN application status
NEW, NEW_SAVING, SUBMITTED, ACCEPTED, RUNNING, FINISHED, FAILED, KILLED
