Author: Raj Kumar

Shell script variables are named memory locations used to store data that can be referenced and manipulated throughout a script. They allow scripts to be dynamic and flexible by holding values such as text, numbers, or the output of commands. Variables in shell scripts help reduce redundancy, enhance readability, and make automation tasks more efficient.…

Bash User Input : Mastering user input in Bash is a fundamental skill every shell scripter must acquire. In this guide, we’ll walk through the modern and practical way of reading input from users using the read command in Bash, tailored for 2025 and beyond. Whether you’re automating system tasks, building CLI tools, or creating…

Bash if, else, and elif Statements : Are you ready to level up your shell scripting skills in 2025? This beginner-friendly guide is your one-stop solution to understanding decision-making in Bash using if, else, and elif statements. In this hands-on tutorial, you’ll explore the power of conditional logic in Bash scripting — the key to…

What is the Observer Pattern? The Observer Pattern is a behavioral design pattern that defines a one-to-many relationship between objects. When one object (called the Subject) changes its state, all its dependents (called Observers) are notified and updated automatically. This pattern is commonly used when multiple parts of a system need to respond to changes…