Apache Hadoop Quick-Start for Xubuntu 16.04 Xenial Linux Easy Guide

February 16, 2017 | By the+gnu+linux+evangelist.

Hadoop 2.X Quick Start for Xubuntu 16.04 Xenial

Hello Xubuntu User! The Tutorial shows you Step-by-Step How to Install and Getting-Started with Apache Hadoop/Map-Reduce vanilla in Pseudo-Distributed mode on Linux Xubuntu 16.04 Xenial GNU/Linux 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 Hadoop Distributed File System (HDFS) is a distributed file system that spreads data blocks across the storage defined for the Hadoop cluster.

The foundation of Hadoop is the two core frameworks YARN and HDFS. These two frameworks deal with Processing and Storage.

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 Apache Hadoop for Xubuntu 16.04 Xenial Require an Oracle JDK 8+ Installation on System.

Install Hadoop for Xubuntu 16.04 Xenial - Featured

Download Latest Apache Hadoop Stable Release:

Apache Hadoop Binary tar.gz

Apache Hadoop
Double-Click on Archive and Extract Into /tmp Directory.

Or from CLI:
```
tar xvzf *hadoop*tar.gz -C /tmp
```
Open a Terminal Shell emulator window
Ctrl+Alt+t on desktop
(Press “Enter” to Execute Commands)

In case first see: Terminal QuickStart Guide.
Relocate Apache Hadoop Directory
Get SuperUser Privileges:
```
sudo su
```
If Got “User is Not in Sudoers file” then see: How to Enable sudo
Then Switch the contents with:
```
mv /tmp/hadoop* /usr/local/
```
Make an hadoop symlink directory:
```
ln -s /usr/local/hadoop* /usr/local/hadoop
```
Make Hadoop Needed Directories:

First, Make the Logs Dir:
```
mkdir /usr/local/hadoop/logs
```
Giving Writing Permissions:
```
chmod 777 /usr/local/hadoop/logs
```
Next Make the Cache Dir:
```
mkdir /usr/local/hadoop/cache
```
Same Writing Permissions as for Logs:
```
chmod 777 /usr/local/hadoop/cache
```
And then also the Temporary Dir:
```
mkdir /usr/local/hadoop/tmp
```
Set the root as Owner:
```
sudo chown -R root:root /usr/local/hadoop*
```
How to Install Required Java JDK 8+ on Xubuntu

Install Oracle JDK 8+ for Xubuntu

Installing Java Oracle JDK 8+ on Xubuntu
Set JAVA_HOME in Hadoop Env File
Make the Conf directory:
```
mkdir /usr/local/hadoop/conf
```
Make an Env file:
```
nano /usr/local/hadoop/conf/hadoop-env.sh
```
Append:
```
export JAVA_HOME=/usr/lib/jvm/[oracleJdkVersion]
```
Change [oracleJdkVersion] with the current Version:
Ctrl+x to Save & Exit from nano Editor :)

Eclipse Hadoop Integration with Free Plugin.

Hadoop Eclipse Plugin SetUp

SetUp Eclipse Hadoop Plugin

Hadoop Configuration for Pseudo-Distributed mode

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

Append:

<?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>

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

Append:

<?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>

Last:

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

Append:

<?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>

SetUp Local Path & Environment
Exit from SuperUser to the normal User:

exit

Change to the Home directory:

cd

Edit the bash Config file:

nano .bashrc

Inserts:

HADOOP_HOME=/usr/local/hadoop/nexport PATH=$PATH:$HADOOP_HOME/bin:$HADOOP_HOME/sbin/nexport JAVA_HOME=/usr/lib/jvm/<oracleJdkVersion>

Then Load the New Setup:

source $HOME/.bashrc

SetUp Needed Local SSH Connection

sudo systemctl start ssh

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

Formatting HDFS
```
hdfs namenode -format
```
Starting Up Hadoop Database
```
start-all.sh
```
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