HDFS commands and architecture

All hadoop commands are invoked by the bin/hadoop script
hadoop fs –help hadoop fs –help lshadoop fs –usage ls $ hadoop fs –ls / hadoop fs –ls

hadoop fs –ls –R /user/cloudera

hadoop fs –mkdir /user/cloudera/dezyre1

sudo –u hdfs hadoop fs –mkdir /dezyre

hadoop fs –copyFromLocal Sample1.txt /user/cloudera/dezyre1

hadoop fs –put Sample2.txt /user/cloudera/dezyre1

hadoop fs –moveFromLocal Sample3.txt /user/cloudera/dezyre1

$ hadoop fs –du /user/cloudera/dezyre1

hadoop fs –df 

hadoop fs –expunge

hadoop fs –cat /user/cloudera/dezyre1/Sample1.txt

hadoop fs –cp /user/cloudera/dezyre/war_and_peace /user/cloudera/dezyre1/

hadoop fs –mv /user/cloudera/dezyre1/Sample1.txt /user/cloudera/dezyre/

hadoop fs –rm -r /user/cloudera/dezyre3

hadoop fs –rm /user/cloudera/dezyre3

hadoop fs -tail /user/cloudera/dezyre/war_and_peace

hadoop fs -tail /user/cloudera/dezyre/war_and_peace

hadoop fs –copyToLocal /user/cloudera/dezyre1/Sample1.txt /home/cloudera/hdfs_bkp/

hadoop fs –get /user/cloudera/dezyre1/Sample2.txt /home/cloudera/hdfs_bkp/

hadoop fs –touchz /user/cloudera/dezyre1/Sample4.txt

hadoop fs –setrep –w 1 /user/cloudera/dezyre1/Sample1.txt

sudo –u hdfs hadoop fs –chgrp –R cloudera /dezyre

sudo –u hdfs hadoop fs –chown –R cloudera /dezyre

hadoop fs –chmod /dezyre

data merge.txt