In this DIY we will see how to set up a single-node Hadoop cluster backed by the Hadoop Distributed File System (HDFS), running on Ubuntu-12.04. The main goal of this tutorial is to get a simple Hadoop installation up and running so that you can play around with the software and learn more about it. This tutorial has been tested with the following software versions: Ubuntu -12.04 (LTS) Hadoop- 1.2.1, released Aug, 2013 JDK- 8 update 5 Step 1: Prerequisites 1. Download Hadoop Hadoop-1.2.1 can be downloaded from here . Select a mirror, then select 'hadoop-1.2.1/' directory and download hadoop-1.2.1.tar.gz . I assume you have downloaded it into your '/home/ user_name /Downloads' directory. 2. Install JDK 8 Hadoop requires a working Java installation. So, open up a terminal and run the following 1 sudo add-apt-repository ppa:webupd8team/java 2 sudo apt-get update && sudo apt-get install oracle-java8-installer It will take some time to dow...