Conventions used

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

CodeInText: 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: "This getAllATMLocations module will first send a SELECT statement to PostgreSQL to retrieve all of the ATM locations."

A block of code is set as follows:

// add query functions
module.exports = {
    getAllATMLocations: getAllATMLocations,
    getSingleATMLocation: getSingleATMLocation,
    createATMLocation: createATMLocation,
    updateATMLocation: updateATMLocation,
    removeATMLocation: removeATMLocation
};

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

[default]
exten => s,1,Dial(Zap/1|30)
exten => s,2,Voicemail(u100)
exten => s,102,Voicemail(b100)
exten => i,1,Voicemail(s0)

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

[centos@ip-172-31-95-213 ~]$ sudo su
[root@ip-172-31-95-213 centos]# cd /usr/local/src/

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Right-click on PostGIS in the list under the Browser panel as shown in the following screenshot and select New Connection:"

Note that a base box is a template of a virtual machine, defined on the Vagrant site as follows: "Boxes are the package format for Vagrant environments. A box can be used by anyone on any platform that Vagrant supports to bring up an identical working environment."

Tips and tricks appear like this.