Conventions

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, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "In a reference implementation, a Neutron DHCP agent runs on one or more infrastructure nodes and spawns a dnsmasq process for each network where DHCP is enabled."

A block of code is set as follows:

[general]

# Generic config options
CONFIG_UNSUPPORTED=n
CONFIG_DEBUG_MODE=n
CONFIG_PROVISION_DEMO=n

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

$ sudo ifdown enp0s3; sudo ifdown enp0s9;
$ sudo ifup enp0s3; sudo ifup enp0s9;

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: "In addition, controller nodes run the database and messaging servers and are often the point of management of the cloud via the Horizon dashboard."

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.