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: "Let's start our Docker journey with the docker version subcommand, as shown here:"
A block of code is set as follows:
FROM busybox
RUN ls -lh
CMD echo Hello world
When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:
FROM busybox
RUN ls -lh
CMD echo Hello world
Any command-line input or output is written as follows:
$ sudo apt-get install -y docker-engine
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: "Now, clicking on the Start using Jenkins button will take you to the Welcome to Jenkins! page."