Update basics.md

Cloud_providers/AWS/basics.md

@@ -1,25 +1,73 @@
 ## AWS 
 
-- [AWS ARN](https://docs.aws.amazon.com/general/latest/gr/aws-arns-and-namespaces.html)
+Amazon Web Services (AWS) is a versatile cloud computing platform offering a wide array of services and tools for businesses and individuals. Here, we'll delve into fundamental concepts, troubleshooting IAM, essential commands, and valuable tips and tricks to empower your AWS journey.
 
-- [AWS IAM](https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_identifiers.html)
+### Basic Concepts
 
-- [AWS Troubleshooting IAM](https://docs.aws.amazon.com/IAM/latest/UserGuide/troubleshoot.html)
+#### [Amazon Resource Names](https://docs.aws.amazon.com/general/latest/gr/aws-arns-and-namespaces.html)
 
-- ARN
-- Amazon Resource Names (ARNs) uniquely identify AWS resources. We require an ARN when you need to specify a resource unambiguously across all of AWS, such as in IAM policies, Amazon Relational Database Service (Amazon RDS) tags, and API calls. 
+Amazon Resource Names (ARNs) are unique identifiers for AWS resources, essential for unambiguous resource specification. ARNs are utilized in IAM policies, Amazon RDS tags, and API calls.
+
+#### [Identity and Access Management (IAM)](https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_identifiers.html)
+
+IAM enables secure management of access to AWS services. Through users, groups, and roles, IAM policies define permissions, evaluated when users make requests.
+
+#### [IAM Policies](https://docs.aws.amazon.com/IAM/latest/UserGuide/troubleshoot_policies.html)
+
+Policies, entities within AWS, define user and resource permissions. AWS assesses policies during requests, ensuring appropriate access control.
+
+ #### [AWS Troubleshooting IAM](https://docs.aws.amazon.com/IAM/latest/UserGuide/troubleshoot.html)
+
+Troubleshooting IAM involves meticulous policy analysis. Ensure policies grant required permissions. Use AWS Policy Simulator to simulate policy effects, aiding policy refinement.
+
+### Essential Commands
+
+#### Kubernetes Contexts
+
+Managing Kubernetes contexts is vital for multiple cluster management:
+
+Get available contexts:
 
-- get contexts
 ``` kubectl config get-contexts ```
 
-- use contexts
+Switch context:
+
+``` kubectl config use-context <context-name> ```
+
+### Updating Cluster Configuration
+
+ Update Kubernetes configuration to connect to an AWS EKS cluster:
+
+Update cluster configuration:
+
+``` aws eks update-kubeconfig --region <region-name> --name <cluster-name> ```
+
+Switch to the updated context:
+
+``` kubectl config use-context arn:aws:eks:<region-name>:<arn-id>:cluster/<cluster-name> ```
+
+### Tips & Tricks
+
+#### 1. Cost Management:
+
+AWS Cost Explorer: Utilize AWS Cost Explorer to visualize and understand your AWS spending patterns. Analyze costs by service or region, enabling effective budget management.
+
+Billing Alerts: Set up billing alerts to receive notifications when your AWS costs exceed predefined thresholds. This proactive approach helps you stay within budget limits.
+
+#### 2. Security Best Practices:
+
+Multi-Factor Authentication (MFA): Enable MFA for enhanced security. MFA adds an extra layer of protection to your AWS account by requiring an additional verification step.
+
+Regular Policy Reviews: Regularly review and update IAM policies. Ensure permissions are correctly assigned and remove unnecessary access to maintain a secure environment.
+
+#### 3. Performance Optimization:
 
-```kubectl config use-context arn:aws:eks:<region-name>:<arn-id>:cluster/<cluster-name>```
+Amazon CloudFront: Implement Amazon CloudFront as your Content Delivery Network (CDN) solution. CloudFront distributes content globally with low latency, ensuring faster load times for users.
 
-- update cluster config 
+Auto Scaling: Leverage AWS Auto Scaling to automatically adjust the number of instances in your application. Scale your resources based on demand, optimizing performance and reducing costs during low traffic periods.
 
-```aws eks update-kubeconfig --region <region-name> --name <cluster-name>```
+#### 4. Resource Tagging:
 
-- IAM Policies
+Tagging Strategy: Develop a consistent tagging strategy for your AWS resources. Tags help in organizing resources, managing costs, and ensuring security compliance.
 
-```A policy is an entity in AWS that, when attached to an identity or resource, defines their permissions. AWS evaluates these policies when a principal, such as a user, makes a request. ```
+Automate Tagging: Automate resource tagging using AWS Lambda functions or AWS Config rules. Consistent tagging simplifies resource tracking and management.