Loading Data into HDFS
user hadoop
$ hdfs namenode -format
Re-format filesystem in Storage Directory /var/app/hadoop/data/dfs/name [Y]
$ exit
user student
$ cd ~
$ wget http://norvig.com/ngrams/shakespeare.txt ~/
$ hadoop fs -mkdir -p shakespeare/input
$ hadoop fs -copyFromLocal ~/shakespeare.txt shakespeare/input
$ hadoop fs -ls shakespeare/input