hdfs Format

$HADOOP_HOME/bin/hdfs namenode -format

Start hdfs

$HADOOP_HOME/sbin/start-dfs.sh

http://localhost:9870

Create the hdfs tree

$HADOOP_HOME/bin/hdfs dfs -mkdir -p /user/ubuntu/input

Start yarn

$HADOOP_HOME/sbin/start-yarn.sh

http://localhost:8088