Book Image

Mastering Go - Second Edition

By : Mihalis Tsoukalos
Book Image

Mastering Go - Second Edition

By: Mihalis Tsoukalos

Overview of this book

Often referred to (incorrectly) as Golang, Go is the high-performance systems language of the future. Mastering Go, Second Edition helps you become a productive expert Go programmer, building and improving on the groundbreaking first edition. Mastering Go, Second Edition shows how to put Go to work on real production systems. For programmers who already know the Go language basics, this book provides examples, patterns, and clear explanations to help you deeply understand Go’s capabilities and apply them in your programming work. The book covers the nuances of Go, with in-depth guides on types and structures, packages, concurrency, network programming, compiler design, optimization, and more. Each chapter ends with exercises and resources to fully embed your new knowledge. This second edition includes a completely new chapter on machine learning in Go, guiding you from the foundation statistics techniques through simple regression and clustering to classification, neural networks, and anomaly detection. Other chapters are expanded to cover using Go with Docker and Kubernetes, Git, WebAssembly, JSON, and more. If you take the Go programming language seriously, the second edition of this book is an essential guide on expert techniques.
Table of Contents (20 chapters)
Title Page

Reading the configuration of network interfaces

There are four core elements in a network configuration: the IP address of the interface, the network mask of the interface, the DNS servers of the machine, and the default gateway or default router of the machine. However, there is a problem here: you cannot find every piece of information using native, portable Go code. This means that there is no portable way to discover the DNS configuration and the default gateway information of a UNIX machine.

As a result, in this section, you will learn how to read the configuration of the network interfaces of a UNIX machine with Go. For that purpose, I will present two portable utilities that allow you to find out information about your network interfaces.

The source code of the first utility, which is called netConfig.go, is presented in three parts. The first part of netConfig.go is shown...