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Amazon Web Services (AWS) tutorials, cloud architecture, serverless applications, EC2, Lambda, ECS, EKS, networking, security, DevOps, cost optimization, and production best practices for building scalable cloud-native systems.
May 30, 2026
AWS Fundamentals: Understanding Cloud Computing, Regions and Availability Zones Introduction Cloud computing has transformed how applications are built and deployed. Instead of purchasing and maintaining physical servers, organizations can rent infrastructure on demand from cloud providers. Amazon Web Services (AWS) is the world's largest cloud provider, followed by Microsoft Azure and Google Cloud Platform (GCP). Life Before Cloud Computing Before cloud providers existed, organizations had to purchase servers, manage networking equipment, maintain cooling systems, handle hardware failures, and forecast future capacity requirements. The Cloud Computing Model | Traditional Infrastructure | Cloud Infrastructure | |----------------------------|----------------------| | Buy servers upfront | Pay as you use | | Manage hardware | AWS manages hardware | | Slow scaling | Instant scaling | | Capacity planning required | Elastic resources | | Hardware replacement responsibility | AWS responsibility | A Brief History of AWS AWS originated as an internal Amazon initiative around 2002. One of the earliest AWS services made available externally was Amazon SQS. Understanding AWS Regions A Region is a physical geographic location where AWS operates infrastructure. | Region | Code | |----------|----------| | Mumbai | ap-south-1 | | Singapore | ap-southeast-1 | | Frankfurt | eu-central-1 | | N. Virginia | us-east-1 | Understanding Availability Zones Regions typically contain between 3 and 6 Availability Zones connected through high-speed networking. Choosing an AWS Region | Factor | Importance | |----------|------------| | Compliance | Data residency requirements | | Latency | Proximity to customers | | Available Services | Not every service is available everywhere | | Pricing | Costs vary by Region | Key Takeaways Cloud computing removes the burden of managing physical infrastructure. AWS is the largest cloud provider globally. Regions are geographic locations. Availability Zones are isolated data centers. Multiple AZs improve reliability.
May 30, 2026
AWS Account Setup, Billing, Free Tier and Support Plans Introduction Creating an AWS account is straightforward, but understanding billing and support options early helps avoid surprises later. AWS Account Creation To use AWS services, you need an email address, phone verification, payment method, and identity verification. AWS Free Tier AWS provides a Free Tier that allows users to explore services and run small projects while learning. Payment Methods Recent improvements include support for UPI mandate setup in India. | Item | Details | |---------|---------| | Payment Method | Card / UPI | | UPI Mandate | Supported | | Typical Mandate Limit | ₹15,000 (subject to AWS changes) | AWS Support Plans | Support Plan | Cost | |--------------|------| | Basic | Free | The Basic Support Plan is sufficient for most learners. Avoiding Unexpected Charges 1. Enable billing alerts. 2. Delete unused resources. 3. Stop EC2 instances when not needed. 4. Monitor the Billing Dashboard regularly. Key Takeaways AWS requires a payment method even for free-tier usage. UPI payment support is available in India. The Basic Support Plan is free and sufficient for most learners.
May 30, 2026
AWS Global Services Explained: Route 53 and IAM Introduction Most AWS services are regional, but some important services are global. Regional vs Global Services Route 53 Route 53 is AWS's DNS service. Because DNS operates globally, Route 53 is considered a global service. IAM IAM stands for Identity and Access Management. IAM manages users, groups, roles, and permissions. Because identities must work across Regions, IAM is a global service. Key Takeaways Most AWS services are regional. Route 53 is a global DNS service. IAM is a global identity service. Global services do not require Region selection.
May 30, 2026
IAM Deep Dive: Users, Groups and Policies Introduction IAM (Identity and Access Management) controls who can access AWS resources and what actions they can perform. Root User When an AWS account is created, a Root User is automatically created. Best practice: do not use the Root User for everyday activities. IAM Users An IAM User represents a person or application requiring AWS access. IAM Groups Groups help manage permissions efficiently. Important: Groups cannot contain other groups. IAM Policies Policies define permissions using JSON. Understanding Policy Components | Component | Description | |------------|------------| | Sid | Statement Identifier | | Effect | Allow or Deny | | Action | API operations allowed | | Resource | Resource affected | | Principal | Entity receiving permissions | IAM Security Tools AWS IAM provides several built-in tools to help administrators audit permissions and improve security. Credentials Report The Credentials Report provides an account-wide view of IAM users and their credential status. It helps answer questions such as: Which users have passwords? Which users have access keys? When was a password last used? When were access keys last rotated? Which credentials are inactive? The report can be downloaded as a CSV file and is commonly used during security audits and compliance reviews. Access Advisor Access Advisor shows which AWS services a user, group, or role has permission to access and when those services were last accessed. This helps identify permissions that are no longer needed. For example: A user may have permissions for S3, EC2, RDS, and Lambda. Access Advisor may show that only S3 and EC2 have been used recently. The unused permissions can then be removed to follow the principle of least privilege. Why These Tools Matter Both Credentials Report and Access Advisor help improve security by: Identifying stale credentials Detecting inactive users Finding excessive permissions Supporting compliance audits Enforcing least-privilege access IAMReadOnlyAccess This managed policy allows users to view IAM resources without modifying them. Multi-Session Support AWS supports multiple sessions in the same browser, making account switching easier. Key Takeaways Avoid using the Root User. Create IAM users for daily work. Use Groups to manage permissions. Policies define permissions. Use Credentials Reports to audit IAM credentials. Use Access Advisor to identify and remove unused permissions. IAM is a global AWS service.
May 30, 2026
Learn the difference between the AWS CLI and AWS SDKs, how to install and configure the AWS CLI, and how to create access keys for authentication.
May 30, 2026
Learn Amazon EC2 fundamentals including AMIs, instance types, t2.micro, security groups, inbound and outbound traffic, and how to launch your first EC2 instance.