Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: " This chapter uses the Apache tar.gz bundles for setting up Hadoop-YARN clusters and gives an overview of Hortonworks and Cloudera installations."

A block of code is set as follows:

<property>
    <name>fs.defaultFS</name>
    <value>hdfs://localhost:8020</value>
    <final>true</final>
</property>

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

hdfs namenode –format

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "View the list of DataNodes connected to the NameNode"

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.