Conventions used

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

Code in text: 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: “ This lets you run a command like spark.read().text(s3://myfile); and Hadoop can natively read that file as if it was local.“

A block of code is set as follows:

#!/bin/bash
sudo python3 -m pip install jupyter
mkdir /home/hadoop/.jupyter
touch /home/hadoop/.jupyter/jupyter_notebook_config.py

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

echo "c.NotebookApp.port = 8887" >> /home/hadoop/.jupyter/jupyter_notebook_config.py
/usr/local/bin/jupyter notebook --config /home/hadoop/.jupyter/jupyter_notebook_config.py

Bold: Indicates a new term, an important word, or words that you see onscreen. For instance, words in menus or dialog boxes appear in bold. Here is an example: “ Click Create Cluster in the Top Right Corner.”

Tips or important notes

Appear like this.