Conventions

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, user input, and Twitter handles are shown as follows: "The kernel.img connects the application to the hardware."

A block of code is set as follows:

#! /bin/sh
# /etc/init.d/btsync
#

# Carry out specific functions when asked to by the system
case "$1" in
start)
    /home/root/.btsync/btsync
    ;;
stop)
    killall btsync
    ;;
*)
    echo "Usage: /etc/init.d/btsync {start|stop}"
    exit 1
    ;;
esac

exit 0

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

mkdir ~/.btsync && cd ~/.btsync

wget http://btsync.s3-website-us-east-1.amazonaws.com/btsync_arm.tar.gz

tar -zxvf btsync_arm.tar.gz
./btsync

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: "Password: The password of that user."