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Go Systems Programming

You're reading from Go Systems Programming Master Linux and Unix system level programming with Go

Product type Paperback

Published in Sep 2017

Publisher Packt

ISBN-13 9781787125643

Length 466 pages

Edition 1st Edition

Languages

Go

Tools

Linux

Concepts

System Programming

Author (1):

Mihalis Tsoukalos

View More author details

Table of Contents (13) Chapters

Preface

1. Getting Started with Go and Unix Systems Programming FREE CHAPTER

2. Writing Programs in Go

3. Advanced Go Features

4. Go Packages, Algorithms, and Data Structures

5. Files and Directories

6. File Input and Output

7. Working with System Files

8. Processes and Signals

9. Goroutines - Basic Features

10. Goroutines - Advanced Features

11. Writing Web Applications in Go

12. Network Programming

Performing DNS lookups

There exist many types of DNS lookups, but two of them are the most popular. In the first type, you want to go from an IP address to a domain name and in the second type you want to go from a domain name to an IP address.

The following output shows an example of the first type of DNS lookup:

$ host 109.74.193.253
253.193.74.109.in-addr.arpa domain name pointer li140-253.members.linode.com.

The following output shows three examples of the second type of DNS lookup:

$ host www.mtsoukalos.eu
www.mtsoukalos.eu has address 109.74.193.253
$ host www.highiso.net
www.highiso.net has address 109.74.193.253
$ host -t a cnn.com
cnn.com has address 151.101.1.67
cnn.com has address 151.101.129.67
cnn.com has address 151.101.65.67
cnn.com has address 151.101.193.67

As you just saw in the aforementioned examples, an IP address can serve many hosts and a host name can have...

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