Week-2 | Day-8: Shell Scripting Basics (Variables & Loops)

🐚 What is Shell Scripting?

• A Shell Script is a text file containing commands that can be executed by the shell (like bash, sh, zsh).
• Helps automate repetitive tasks (file backups, system monitoring, deployments, etc.).

🧩 Variables

Variables store data that can be reused later in the script.

Syntax:

variable_name=value

⚠️ No spaces before or after = in Bash.

Example:

#!/bin/bash
name="Harideep"
echo "Hello, $name! Welcome to CloudInSteps."

Reading input from user:

echo "Enter your favorite tool:"
read tool
echo "You like $tool!"

Types of variables:

• System Variables: predefined (e.g., $USER, $HOME, $PWD)
• User-defined Variables: created by the user

Example:

echo "Current user: $USER"
echo "Home directory: $HOME"