Conventions used

There are a number of text conventions used throughout this book.

Code in text: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: “While logged in as root, your prompt will end with the # sign. When logged in as a normal user, it will present you with $.”

A block of code is set as follows:

docker build [OPTIONS] PATH | URL | -

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

docker build [OPTIONS] PATH | URL | -

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

chmod ug=rx testfile

Bold: Indicates a new term, an important word, or words that you see onscreen. For instance, words in menus or dialog boxes appear in bold. Here is an example: “Ansible Galaxy is a community-driven platform that hosts an extensive collection of Ansible roles and playbooks.”

Tips or important notes

Appear like this.