In this book, you will find a number of styles of text 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, and user input are shown as follows: "Either of these methods requires the use of the command line, sudo rights, and the apt-get package manager."

A block of code is set as follows:

deb        http://qgis.org/debian trusty main
deb-src    http://qgis.org.debian trusty main

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

sudo apt-get update
sudo apt-get install qgis python-qgis

New terms and important words are shown in bold. Words that you see on the screen, in menus or dialog boxes for example, appear in the text like this: "The QGIS interface is divided into four interface types: Menu Bar, Toolbars, Panel, and Map Display."