How to Install Hadoop on Oracle Linux 6.X Step-by-Step Guide

Install Hadoop 2.X for Oracle Linux 6.X

Hi! The Tutorial shows you Step-by-Step How to Install and Getting-Started with Apache Hadoop/Map-Reduce vanilla in Pseudo-Distributed mode on Oracle Linux 6.x 32/64-bit KDE/GNOME Desktop.

Hadoop is a distributed master-slave that consists of the Hadoop Distributed File System (HDFS) for storage and Map-Reduce for computational capabilities.

The Guide Describe a System-Wide Setup with Root Privileges but you Can Easily Convert the Procedure to a Local One.

The Contents and Details of How to Install Hadoop on Oracle Linux 6.X are Expressly Essentials to Give Focus Only to the Essentials Instructions and Commands.

1. Download Latest Apache Hadoop Stable Release:

   Apache Hadoop Binary tar.gz

   Apache Hadoop

2. Double-Click/Right-Click on Archive & Extract into /tmp.

   

3. Open Terminal Window
   (Press “Enter” to Execute Commands)

   Cmd and Search “term”

   

   In case first see: Terminal QuickStart Guide.

4. Relocate Apache Hadoop Directory

   su 

   If Got “User is Not in Sudoers file” then see: How to Enable sudo

   mv /tmp/hadoop* /usr/local/

   ln -s /usr/local/hadoop* /usr/local/hadoop

   mkdir /usr/local/hadoop/tmp

   sudo chown -R root:root /usr/local/hadoop*

5. How to Install Required Java JDK on Oracle Linux

   Install Oracle JDK for Oracle Linux

   Installing JDK on Oracle Linux

6. Set JAVA_HOME in Hadoop Env File

   nano /usr/local/hadoop/conf/hadoop-env.sh

   Inserts:

   /nexport JAVA_HOME=/usr/lib/jvm/<oracleJdkVersion>

   Ctrl+x to Save & Exit :)

7. Configuration for Pseudo-Distributed mode

   nano /usr/local/hadoop/conf/core-site.xml

   The Content Should Look Like:

   <?xml version=”1.0″?>
   <?xml-stylesheet type=”text/xsl” href=”configuration.xsl”?>
   <configuration>
   <property>
   <name>hadoop.tmp.dir</name>
   <value>/usr/local/hadoop/tmp</value>
   </property>
   <property>
   <name>fs.default.name</name>
   <value>hdfs://localhost:8020</value>
   </property>
   </configuration>

   Next:

   nano /usr/local/hadoop/conf/hdfs-site.xml

   The Content Should Look Like:

   <?xml version=”1.0″?>
   <?xml-stylesheet type=”text/xsl” href=”configuration.xsl”?>
   <configuration>
   <property>
   <name>dfs.replication</name>
   <value>1</value>
   </property>
   <property>
   <!– specify this so that running ‘hdfs namenode -format’
   formats the right dir –>
   <name>dfs.name.dir</name>
   <value>/usr/local/hadoop/cache/hadoop/dfs/name</value>
   </property>
   </configuration>

   Latest:

   nano /usr/local/hadoop/conf/mapred-site.xml

   The Content Should Look Like:

   <?xml version=”1.0″?>
   <?xml-stylesheet type=”text/xsl” href=”configuration.xsl”?>
   <configuration>
   <property>
   <name>mapred.job.tracker</name>
   <value>localhost:8021</value>
   </property>
   </configuration>

8. SetUp Path & Environment

   su <myuser>

   cd  

   nano .bashrc

   Inserts:

   HADOOP_HOME=/usr/local/hadoop
   /nexport PATH=$PATH:$HADOOP_HOME/bin:$HADOOP_HOME/sbin

   The JAVA_HOME is Set Following Oracle Java JDK6+ Installation Version…

   Then Load New Setup:

   source $HOME/.bashrc

9. SetUp Needed Local SSH Connection

   su -c "openssh-server"

   Generate SSH Keys to Access:

   ssh-keygen -b 2048 -t rsa

   echo "$(cat ~/.ssh/id_rsa.pub)" > ~/.ssh/authorized_keys

   Testing Connection:

   ssh 127.0.0.1

10. Formatting HDFS

    hdfs namenode -format

    

11. Starting Up Hadoop Database

    start-all.sh

12. Apache Hadoop Database Quick Start Guide

    Hadoop MapReduce Quick Start

    The Linked Guide Contains a Step-by-Step Jump Start Guide for Apache Hadoop Database