Setting up an Hadoop attack environment

Description

This tutorial explains how to set up a working environment in order to perform attacks from the Hadoop client CLI such as:

This tutorial is valid for a Linux environment and has been tested on Kali.

$ cd /opt && wget http://apache.mirrors.ovh.net/ftp.apache.org/dist/hadoop/common/hadoop-2.7.3/hadoop-2.7.3.tar.gz

Decompress the archive
```
$ tar xvf hadoop-2.7.3.tar.gz
```
Set, if not already done, the JAVA_HOME environment variable (use $ update-alternatives --config java to find your Java path)
```
$ export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-i386
```
(Optional) Add the Hadoop bin path to the PATH environment variable
```
$ export PATH=$PATH:/opt/hadoop-2.7.3/bin
```
Test that everything is OK
```
$ hadoop version
```