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: "A directory, coreos-vagrant, is created after git clone."

A block of code is set as follows:

[Unit]
Description=Example
After=docker.service
Requires=docker.service

[Service]
TimeoutStartSec=0
ExecStartPre=-/usr/bin/docker kill busybox1
ExecStartPre=-/usr/bin/docker rm busybox1
ExecStartPre=/usr/bin/docker pull busybox
ExecStart=/usr/bin/docker run --name busybox1 busybox /bin/sh -c "while true; do echo Hello World; sleep 1; done"
ExecStop=/usr/bin/docker stop busybox1

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

weave status
...
        Service: dns
         Domain: weave.local.
       Upstream: 10.0.2.3
            TTL: 1
        Entries: 2

        Service: proxy
        Address: unix:///var/run/weave/weave.sock

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: "Click on Datastore ISO File and select the uploaded iso file from the data store."

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.