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: "You will need the hadoop-client-<version>.jar file to be added".

A block of code is set as follows:

    <dependencies>
         <dependency>
             <groupId>org.apache.hadoop</groupId>
             <artifactId>hadoop-client</artifactId>
             <version>3.1.0</version>
         </dependency>
     </dependencies>

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

<!-- Put site-specific property overrides in this file. --><configuration>
        <property>
                <name>fs.default.name</name>
                <value>hdfs://<master-host>:9000</value>
        </property>
</configuration>

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

hrishikesh@base0:/$ df -m

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: "Right-click on the project and run Maven install, as shown in the following screenshot".