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, path names, dummy URLs, user input, and Twitter handles are shown as follows: "To change the size of text use the font-size property."

A block of code is set as follows:

h2 {
  font-size: 26px;
  font-style: italic;
  color: #eb2428;
  margin-bottom: 10px;
} 

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

h2 {
 font-size: 26px;
 font-style: italic;
 color: #eb2428;
 margin-bottom: 10px;
} 

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

# cp /usr/src/asterisk-addons/configs/cdr_mysql.conf.sample/etc/asterisk/cdr_mysql.conf
  

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: "Clicking on the Next button moves you to the next screen."