Overview What You Will Learn Curriculum Instructor

Course Overview

The jq command-line tool is a powerful and lightweight JSON processor that is essential for developers, system administrators, and DevOps engineers working with APIs, configuration files, or shell scripts. As JSON becomes the de facto data format for web services and configuration management, the ability to parse, filter, and transform JSON data directly from the command line has become an indispensable skill. Learning how to effectively use jq allows for automation, data extraction, and transformation tasks to be performed efficiently in shell environments without relying on bulky third-party libraries.

This course begins with a foundational understanding of how to install jq, verify its version, and locate help resources. It progresses through core topics such as working with identity and field filters, extracting raw strings, and passing JSON input via different methods. Learners are introduced to real-world examples, including REST API interaction using shell scripts, JSON array slicing, and object construction. Advanced topics include function chaining with pipes, conditional statements, string operations, and the use of system environment variables with jq. The course also explores how jq interacts with the operating system, how to handle exit statuses in scripts, and key functions like map, select, has, unique, and more.

This chapter equips learners with practical jq skills to manipulate JSON data efficiently within shell scripts and real-world system automation workflows.

What You Will Learn

  • Learn the basics of Jq
  • Explore how to Parse (read and write) JSON Data with Jq Command
  • Learn how to use Jq Command in Bash Shell Scripting
  • Find out how to pretty print json in the command line
  • Learn to use different type of filter on JSON Data
  • Discover how to use jq select function with iterator filter and map function

Program Curriculum

  • Install Jq command, Verify the Version and Get Help from Command Line
  • Public REST APIs to Practice with Jq Command
  • Basic Understanding of Jq Input and Outputs
  • $7 Million Cybersecurity Scholarship by EC-Council
  • Chapter 1 Quiz

  • Identity Filter
  • Different Ways to Pass JSON Data as an Input to Jq Command
  • Field Filter
  • How to Get Raw String for a Given Key or Property?
  • Field Filter, Comma, and Raw String Combination
  • Chapter 2 Quiz

  • Jq Command Usage to Read userName and Password from REST API

  • Shell Script
  • Chapter 3 Quiz

  • Basic Concepts to Work with Arrays
  • JSON Array Slicing using Jq Command
  • Chapter 4 Quiz

  • Constructing Objects and Arrays with and Without Inputs
  • Constructing null, number, strings and boolean with and Without Inputs
  • Indentation with --tab and Compact Output with -c Option
  • Chapter 5 Quiz

  • Introduction to Functions and Pipes (To Combine Filters and Functions)
  • join and range Functions
  • has Function
  • map Function
  • select Function
  • Chapter 6 Quiz

  • env Object

Usage of Export in Linux for env Object

  • Simple Shell Script
  • --arg Option to Work with OS Environment and Custom Variables
  • Functions: tonumber, tostring, ascii_upcase & ascii_ downcase
  • How to use Variables with Filters & Others (Function, Conditional etc.)
  • Chapter 7 Quiz
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Instructor

Narendra P

Narendra is an IT Professional with 7+ years of experience in different Domains. Very much interested in learning new technologies and teaching. He believes that the best way to learn by doing it in a fun way. He has good practical knowledge of automation with different Scripting languages like Shell Scripting, Python Scripting, and YAML Scripting. His online classes focus on providing high-quality documentation with practical knowledge. Hands-on experience in learning new technology that makes learning really interesting.

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