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.

There are three styles for code listings. Code words within text are shown as follows: "Rather than get the contents of myFile with the getContents() method, we construct a new CmsXmlControlFile object".

If we have a block of code, it will be set as follows:

#!/usr/bin/perl -w
# spamlogfileparser.pl - parse /var/log/messages and calculate statistics
use strict;
# declare variables
my (@ham, @spam, %seen);

When we wish to draw your attention to a particular part of a code block, the relevant lines will be made bold:

#!/bin/sh
# check_process.sh check a process is running
RECIPIENT=postmaster@mycompany.com
if [[ $1 = "" ]]; then

New terms and important words are introduced in a bold-type font. Words that you see on the screen—in menus or dialog boxes, for example—appear in the text as follows: "Clicking the Next button moves you to the next screen".

Tip

Tips, suggestions, or important notes appear in a box like this.

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

mysql> create table books (name char(100), author char(50));
Query OK, 0 rows affected (0.03 sec)