🐚 Shell Scripting for DevOps

A hands-on repository documenting my journey of learning Bash Shell Scripting for DevOps.

This repository contains practical shell scripts, exercises, log-processing examples, and automation practice designed to build the scripting skills commonly used in DevOps, Cloud, Linux, and Infrastructure Automation.

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🚀 About This Repository

Shell scripting is an important skill for DevOps engineers because it allows repetitive operational tasks to be automated.

Through this repository, I am practising how to use Bash to:

• Automate repetitive Linux tasks
• Work with variables and user input
• Use conditional statements
• Work with loops
• Create reusable functions
• Process files and logs
• Handle errors
• Execute Linux commands through scripts
• Build automation useful for DevOps workflows

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📂 Repository Structure

Shell-Scripting-For-DevOps/
│
├── day01/
├── day02/
├── day03/
├── log-files/
├── practice-scripts/
│
├── hello.sh
├── variables.sh
└── README.md

📘 day01/

Introduction to shell scripting and Bash fundamentals.

Topics include:

• Basic Bash syntax
• Running shell scripts
• Variables
• Printing output
• Command execution

📘 day02/

Continues into programming concepts used in Bash.

Topics include:

• Conditional statements
• Loops
• User input
• Arguments
• Basic automation logic

📘 day03/

More practical shell scripting and DevOps-focused exercises.

Focus areas include:

• Automation
• Error handling
• Linux administration
• Working with commands and services
• Practical scripting scenarios

🧪 practice-scripts/

A collection of scripts created while practising Bash concepts.

The goal of this directory is to move from basic syntax toward scripts that can automate real operational tasks.

📊 log-files/

Sample log files used to practise Linux text-processing and troubleshooting commands such as:

grep
awk
sed
cut
sort
uniq
head
tail

Log analysis is particularly useful in DevOps when troubleshooting applications, servers, containers, and CI/CD systems.

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🛠️ Technologies & Tools

• Bash
• Linux
• Shell Scripting
• Git
• GitHub
• Linux CLI
• AWS CLI
• Docker
• Cron
• grep / awk / sed

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🧠 Concepts Covered

Variables

name="Riyan"
location="London"

echo "My name is $name"
echo "Location: $location"

User Input

read -p "Enter your name: " name
echo "Hello $name"

Conditions

if [ "$1" == "start" ]; then
    echo "Starting service..."
else
    echo "Unknown command"
fi

For Loops

for server in server1 server2 server3
do
    echo "Checking $server"
done

Functions

check_service() {
    echo "Checking service status..."
}

Command Substitution

current_date=$(date)

echo "Current date: $current_date"

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⚙️ Running the Scripts

Clone the repository:

git clone https://github.com/riyan-ahmed/Shell-Scripting-For-DevOps.git

Move into the project:

cd Shell-Scripting-For-DevOps

Give a script execution permission:

chmod +x script.sh

Run it:

./script.sh

Alternatively:

bash script.sh

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🐛 Debugging Shell Scripts

Bash scripts can be debugged using:

bash -x script.sh

You can also check the exit status of the previous command:

echo $?

A return value of:

0

normally indicates that the command completed successfully.

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💡 Why Shell Scripting Matters in DevOps

Shell scripting can be used to automate tasks such as:

• Server configuration
• Application deployment
• Log analysis
• System monitoring
• User management
• Package installation
• Backup automation
• Docker operations
• Cloud resource management
• CI/CD pipeline tasks
• Scheduled jobs using Cron

Instead of manually repeating commands, DevOps engineers can turn them into reusable scripts.

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🎯 Learning Goal

The aim of this repository is to develop strong Bash scripting fundamentals and progress toward writing reliable automation for real DevOps environments.

The learning path is:

Bash Fundamentals
       ↓
Variables & Input
       ↓
Conditions
       ↓
Loops
       ↓
Functions
       ↓
Files & Logs
       ↓
Error Handling
       ↓
Linux Automation
       ↓
DevOps Automation

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🔮 Future Improvements

As I continue learning, I plan to add scripts covering:

• System health monitoring
• Disk and memory monitoring
• Automated backups
• User management
• Package installation
• Service monitoring
• Docker automation
• AWS automation using AWS CLI
• Log monitoring and alerting
• Cron job automation
• Deployment automation

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👨‍💻 Author

Riyan Ahmed

DevOps | Cloud | Platform Engineering

GitHub: riyan-ahmed

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⭐ Repository Purpose

This repository is part of my hands-on DevOps learning journey.

Rather than only studying shell scripting concepts theoretically, the focus is on writing, testing, debugging, and improving scripts through practical exercises.

If you find the repository useful, feel free to ⭐ the project.