hadoop-conf-sample

hadoop-conf

sudo mkdir -p /app/hadoop/tmp
sudo chmod 777 /app/hadoop/tmp
sudo chown hdfs:hadoop /app/hadoop/tmp

<-- IN CORE-SITE.XML -->

<configuration>
<property>    
  <name>fs.defaultFS</name>    
  <value>hdfs://localhost:9000</value>    
</property> 

<property>
  <name>hadoop.tmp.dir</name>
  <value>/app/hadoop/tmp</value>
</property>
</configuration>

<--IN hdfs-site.xml-->

</configuration>
<property>
  <name>dfs.replication</name>
  <value>1</value>
</property>
</configuration>
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Execute the following commands

sudo -u hdfs hadoop namenode -format
cd $HADOOP_HOME/bin
./start-all.sh