To get the most out of this book

1. A general knowledge of Unix would be very helpful, although isn't mandatory
2. Access to a computer with an internet connection will be needed in order to download the necessary tools and software used in the exercises 
3. No prior knowledge of the subject area has been assumed as such
4. Installation instructions for all the software and tools have been provided in Chapter 3, The Analytics Toolkit.

Download the example code files

You can download the example code files for this book from your account at www.packtpub.com. If you purchased this book elsewhere, you can visit www.packtpub.com/support and register to have the files emailed directly to you.

You can download the code files by following these steps:

1. Log in or register at www.packtpub.com.
2. Select the SUPPORT tab.
3. Click on Code Downloads & Errata.
4. Enter the name of the book in the Search box and follow the onscreen instructions.

Once the file is downloaded, please make sure that you unzip or extract the folder using the latest version of:

• WinRAR/7-Zip for Windows
• Zipeg/iZip/UnRarX for Mac
• 7-Zip/PeaZip for Linux

The code bundle for the book is also hosted on GitHub at https://github.com/PacktPublishing/Practical-Big-Data-Analytics. We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!

Download the color images

We also provide a PDF file that has color images of the screenshots/diagrams used in this book. You can download it here: http://www.packtpub.com/sites/default/files/downloads/PracticalBigDataAnalytics_ColorImages.pdf.

Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "The results are stored in HDFS under the /user/cloudera/output."

A block of code is set as follows:

   "_id" : ObjectId("597cdbb193acc5c362e7ae97"), 
   "firstName" : "Nina", 
   "age" : 53, 
   "frequentFlyer" : [ 
          "Delta", 
          "JetBlue", 
          "Delta" 

Any command-line input or output is written as follows:

$ cd Downloads/ # cd to the folder where you have downloaded the zip file 

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "This sort of additional overhead can easily be alleviated by using virtual machines (VMs)"

Warnings or important notes appear like this.

Tips and tricks appear like this.