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Network Programming and Automation Essentials

You're reading from   Network Programming and Automation Essentials Get started in the realm of network automation using Python and Go

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Product type Paperback
Published in Apr 2023
Publisher Packt
ISBN-13 9781803233666
Length 296 pages
Edition 1st Edition
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Author (1):
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Claus Töpke Claus Töpke
Author Profile Icon Claus Töpke
Claus Töpke
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Table of Contents (16) Chapters Close

Preface 1. Part 1: Foundations for Network Automation
2. Chapter 1: Network Basics for Development FREE CHAPTER 3. Chapter 2: Programmable Networks 4. Chapter 3: Accessing the Network 5. Chapter 4: Working with Network Configurations and Definitions 6. Part 2: Network Programming for Automation
7. Chapter 5: Dos and Don’ts for Network Programming 8. Chapter 6: Using Go and Python for Network Programming 9. Chapter 7: Error Handling and Logging 10. Chapter 8: Scaling Your Code 11. Part 3: Testing, Hands-On, and Going Forward
12. Chapter 9: Network Code Testing Framework 13. Chapter 10: Hands-On and Going Forward 14. Index 15. Other Books You May Enjoy

Working with the CLI

The Command-Line Interface (CLI) is perhaps the most widely available method for accessing a network device. It is a term imported from computers, which was a replacement for teletypewriter (TTY) machines. A CLI is normally implemented by using a program that runs inside the device to interpret the keys being typed. Early implementations of the CLI program monitored the device’s serial port, where a terminal with a keyboard was connected to communicate.

In UNIX, the CLI program was called a shell, and the first shell, called the V6 shell, was created in 1971 by Ken Thompson at Bell Labs. The Bourne shell was introduced in 1977 as a replacement for the V6 shell. Although the UNIX shell is used as an interactive command interpreter, it was also intended to be a scripting language and contains most of the features that are commonly considered to produce structured programs.

Network devices use a simplified version of a shell for their CLIs. Let’...

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