# 🗂️ Day 3 – S3, IAM & AWS CLI

Welcome to **Day 3** of the **7 Days of AWS Challenge** 🚀  
Today, you’ll explore how to store and protect data on AWS, manage user access securely, and perform tasks from the **Command Line Interface (CLI)** like a true Cloud Engineer.

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## **🧠 Concepts to Learn**

### **☁️ What is Amazon S3?**

**Amazon Simple Storage Service (Amazon S3)** is a **scalable object storage service** that allows you to store and retrieve data from anywhere on the internet.  
Common use cases include:

* Backup & Restore
    
* Hosting Static Websites
    
* Data Archiving & Content Delivery
    

📘 [S3 Documentation → Click Here](https://docs.aws.amazon.com/s3/?icmpid=docs_homepage_featuredsvcs)

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### **👤 What is IAM?**

**Identity and Access Management (IAM)** is AWS’s service for **controlling access** to resources securely.  
It lets you create users, groups, and roles with defined permissions.

**Key Components:**

* **Users** – Individual accounts
    
* **Groups** – Collection of users with common permissions
    
* **Roles** – Temporary credentials for apps or services
    
* **Policies** – JSON documents defining permissions
    

📘 [IAM Documentation → Click Here](https://aws.amazon.com/iam/?gclid=Cj0KCQiA67CrBhC1ARIsACKAa8QO24yZlrPkHNhtrrjI1zqNu85WCpVUCJgiNaYEouhOX5HIRu1QUTsaAroQEALw_wcB&trk=858d3377-dc99-4b71-b7d9-dfbd53b3fb6c&sc_channel=ps&ef_id=Cj0KCQiA67CrBhC1ARIsACKAa8QO24yZlrPkHNhtrrjI1zqNu85WCpVUCJgiNaYEouhOX5HIRu1QUTsaAroQEALw_wcB:G:s&s_kwcid=AL!4422!3!651612429263!p!!g!!amazon%20iam!19836375022!146902912293)

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### **💻 What is AWS CLI?**

**AWS Command Line Interface (CLI)** is a unified tool that lets you manage AWS services from your **terminal** instead of the console.

With CLI, you can:

* Launch EC2 instances
    
* Upload data to S3
    
* Configure IAM roles and permissions
    

📘 [AWS CLI Documentation → Click Here](https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-welcome.html)

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## **🎯 Tasks for Day 3**

### **🪜 Task 1: Secure Your S3 Bucket**

* Create a **private S3 bucket** in AWS.
    
* Modify the **bucket policy** so you can access its contents securely *without making it public*.
    

> 💡 This helps you understand how to secure your S3 storage using policies.

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### **🪜 Task 2: Configure AWS CLI**

* Install and configure the **AWS CLI** on your Ubuntu or local machine using your AWS credentials.
    

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### **🪜 Task 3: Launch EC2 Using CLI**

* Create an **EC2 instance using AWS CLI**.
    

> 🧩 Resource: [Creating EC2 Using AWS CLI (Blog)](https://madhup.hashnode.dev/creating-an-ec2-instance-on-aws-using-awscli)

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### **🪜 Task 4: IAM Access Setup for a New Team Member**

**Scenario:**  
You’re an IT admin at *GlobalTech Inc.* and a new team member, **Alex**, joins your team.

You must configure IAM to provide **specific access rights**:

* View EC2 instances (monitor only).
    
* Create S3 buckets (no EC2 modification rights).
    

Document your steps and write a short **LinkedIn blog** titled:

> “Day 3 of #7DaysOfAWS — How I Managed IAM, S3 & CLI on AWS!”

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## **💬 Engagement Activity**

✅ Post your Day 3 learnings on **LinkedIn** with hashtags

> `#7DaysOfAWS` `#AWSwithTWS`

Mention:

> “Day 3 of my 7 Days of AWS Challenge with @TrainWithShubham 🚀  
> Learned about IAM, S3, and AWS CLI — and how to securely manage access in the cloud!”

You can also:

* Comment on 2 other learners’ posts
    
* Share your favorite AWS command
    
* Ask a question on [Discord](https://discord.gg/7GjDgDHR49)
    

Engage → Learn → Grow 🌱

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## **🧩 Finding It Difficult?**

No worries — reach out on:

* 💬 [LinkedIn](https://www.linkedin.com/in/shubhamlondhe1996/)
    
* 💭 [Discord Community](https://discord.gg/7GjDgDHR49)
    
* 🌐 [Official Website](https://trainwithshubham.com/)
    

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## **🌟 Bonus Tip**

> Real engineers automate — once you master CLI, you’ll never go back to clicking buttons in the console 😉  
> Try to perform *all future tasks using AWS CLI commands.*

Happy Learning ✨  
**– TrainWithShubham**