hadoop_Config.txt

#HADOOP VARIABLES START
export JAVA_HOME=/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.60-2.4.3.0.fc20.i386/
export HADOOP_INSTALL=/usr/local/hadoop
export PATH=$PATH:$HADOOP_INSTALL/bin
export PATH=$PATH:$HADOOP_INSTALL/sbin
export HADOOP_MAPRED_HOME=$HADOOP_INSTALL
export HADOOP_COMMON_HOME=$HADOOP_INSTALL
export HADOOP_HDFS_HOME=$HADOOP_INSTALL
export YARN_HOME=$HADOOP_INSTALL
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_INSTALL/lib/native
export HADOOP_OPTS="-Djava.library.path=$HADOOP_INSTALL/lib"
#HADOOP VARIABLES END


 sudo vi /usr/local/hadoop/etc/hadoop/core-site.xml
    <property>
        <name>fs.default.name</name>
        <value>hdfs://localhost:9000</value>
    </property>


/usr/local/hadoop/etc/hadoop/yarn-site.xml
    <property>
        <name>yarn.nodemanager.aux-services</name>
        <value>mapreduce_shuffle</value>
    </property>
    <property>
        <name>yarn.nodemanager.aux-services.mapreduce.shuffle.class</name>
        <value>org.apache.hadoop.mapred.ShuffleHandler</value>
    </property>

sudo gedit mapred-site.xml
    <property>
        <name>mapreduce.framework.name</name>
        <value>yarn</value>
    </property>

hdfs-site.xml
	<property>
        <name>dfs.replication</name>
        <value>1</value>
    </property>
    <property>
        <name>dfs.namenode.name.dir</name>
        <value>file:/usr/local/hadoop/hdfs/name</value>
    </property>
    <property>
        <name>dfs.datanode.data.dir</name>
        <value>file:/usr/local/hadoop/hdfs/data</value>
    </property>