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 and user input are shown as follows: "Where path/to/raspbian_image.img is the extracted image file and sdX is the path to your SD card."

A block of code is set as follows:

#!/bin/bash
sleep 20
cd /home/pi
python player.py -d music --random -f 99.9 &

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

ffmpeg -i file.mp3 -f s16le -ar 22.05k -ac 2 - | sudo ./pifm - freq 22050 stereo

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: "Files can be uploaded by right-clicking on them and selecting Upload."