Conventions Used in This Book

In this book, you'll find several notification icons—Note, Caution, and Tip—that point out important information. Here's what the three types of icons look like:

Note 

Notes provide you with additional information or resources.

Caution 

A caution indicates that you should use extreme care to avoid a potential disaster.

Tip 

A tip is advice that can save you time and energy.

Code lines are often longer than what will fit across a page. The symbol indicates that the following code line is actually a continuation of the current line. For example,

 # dpkg-query -W --showformat='${Installed-Size} ${Package}\n'  | sort -n 

is really one line of code when you type it into your editor.

Code, filenames, functions, and so forth within the text of this book appear in a monospace font, while content you will type appears either bold or monospaced.