In this book, you will find many styles of text that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.

A block of code is set as follows:

[default]
 T = "123"
 A := "${B} ${A} test ${T}"
 T = "456"
 B = "${T} bval"
 C = "cval"
 C := "${C}append"

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

[default]
 T = "123"
 A := "${B} ${A} test ${T}"
 T = "456"
 B = "${T} bval"
 C = "cval"
 C := "${C}append"

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

$ sudo apt-get install gawk wget git-core diffstat unzip texinfo build-essential chrpath

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: "After that, click the Image Recipes tab to choose the image you want to build. "