🐚 Shell Scripting

A collection of Bash/Shell scripting programs covering Linux fundamentals, automation tasks, scripting concepts, and practical examples. This repository serves as a learning resource for understanding shell scripting and building automation scripts for Linux environments.

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📌 About

This repository contains 177+ shell scripts that demonstrate various Bash scripting concepts, including:

• Shell script fundamentals
• Variables and user input
• Conditional statements (if, elif, case)
• Loops (for, while, until, break, continue)
• Functions and argument handling
• File and directory operations
• String manipulation
• Arithmetic operations
• Logical operators (AND, OR)
• Arrays and key-value pairs
• Process automation
• System administration tasks
• Utility scripts for Linux
• Practice assignments (140+ scripts)

The goal is to learn Bash scripting through hands-on examples and practical implementations.

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📂 Repository Structure

Shell_Scripting/
│
├── basic/                 # Basic shell script examples (1 script)
├── variables/             # Variable declarations and usage (3 scripts)
├── comments/              # Comment examples (1 script)
├── Arithmetics_Ops/       # Arithmetic operations (1 script)
├── Calculator/            # Simple calculator script (1 script)
├── Condition/             # Conditional statements - if, elif, else (2 scripts)
├── switch/                # Case/switch statements (1 script)
├── Logical_Operator/      # Logical operators - AND, OR (4 scripts)
├── Loops/                 # Loop control - break, continue (2 scripts)
├── functions/             # Function definitions and usage (4 scripts)
├── arrays/                # Array operations (2 scripts)
├── strings/               # String manipulation (4 scripts)
├── key_value/             # Key-value pair handling (1 script)
├── User_Interaction/      # User input and interaction (3 scripts)
├── assignment/            # Practice assignments set 1 (74 scripts)
├── assignments2/          # Practice assignments set 2 (72 scripts)
├── git_log.log            # Git commit history log
├── git_log.txt            # Git commit history text
├── sleep.sh               # Sleep command example
└── README.md

Total: 177 shell scripts across 15 topic directories

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🚀 Features

• Beginner-friendly shell scripts
• Well-commented code
• Covers essential Bash scripting concepts
• Real-world automation examples
• Linux command demonstrations
• Easy to understand and modify
• Extensive practice assignments

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🛠 Prerequisites

Before running the scripts, make sure you have:

• Linux (Ubuntu/Debian/Fedora/CentOS etc.)
• macOS Terminal
• WSL (Windows Subsystem for Linux)
• Bash Shell

Check your Bash version:

bash --version

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▶️ Running a Script

Clone the repository:

git clone https://github.com/Mihir-Mithani/Shell_Scripting.git

Navigate into the repository:

cd Shell_Scripting

Give execution permission:

chmod +x script_name.sh

Run the script:

./script_name.sh

or

bash script_name.sh

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📚 Topics Covered

Fundamentals

• Introduction to Bash
• Shebang (#!/bin/bash)
• Variables and constants
• Environment Variables
• Command Line Arguments
• User Input
• Comments

Control Structures

• If Statements
• If-Else Statements
• Elif (Else If) Statements
• Nested Conditions
• Case Statements (Switch)
• For Loops
• While Loops
• Until Loops
• Loop Control (break, continue)

Data Structures & Operations

• Functions
• Arrays
• Key-Value Pairs
• String Operations (slice, replace, case conversion)
• Arithmetic Operations
• Logical Operators (AND, OR)

Advanced Topics

• File Handling
• Process Management
• Scheduling Tasks
• Basic Linux Automation
• Calculator Implementation

Practice Assignments

• Assignment Set 1 (74 scripts): Progressive exercises covering all topics
• Assignment Set 2 (72 scripts): Additional practice problems

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📖 Examples

Basic Hello World

#!/bin/bash

echo "Hello, World!"
echo "Welcome to Shell Scripting."

Output:

Hello, World!
Welcome to Shell Scripting.

Variables and User Input

#!/bin/bash

echo "Enter your name:"
read name
echo "Hello, $name!"

Conditional Statement

#!/bin/bash

echo "Enter a number:"
read num

if [ $num -gt 0 ]; then
    echo "Positive number"
elif [ $num -lt 0 ]; then
    echo "Negative number"
else
    echo "Zero"
fi

Loop Example

#!/bin/bash

for i in {1..5}; do
    echo "Iteration $i"
done

Function Example

#!/bin/bash

greet() {
    echo "Hello, $1!"
}

greet "World"
greet "User"

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💡 Learning Objectives

By completing these scripts, you will learn how to:

• Write executable shell scripts
• Automate repetitive Linux tasks
• Work with files and directories
• Process user input
• Create reusable Bash functions
• Debug shell scripts
• Build simple system administration tools
• Handle arrays and strings
• Perform arithmetic and logical operations
• Use control structures effectively

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🎯 Future Improvements

• Advanced Bash scripting examples
• Log monitoring scripts
• Backup automation
• Cron job examples
• Server health monitoring
• Menu-driven shell applications
• DevOps automation scripts
• Error handling and debugging techniques

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🤝 Contributing

Contributions are welcome!

If you have improvements or additional scripts:

1. Fork the repository
2. Create a new branch
3. Commit your changes
4. Open a Pull Request

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📄 License

This project is licensed under the MIT License.

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👨‍💻 Author

Mihir Mithani

• GitHub: https://github.com/Mihir-Mithani

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