IAM

AWS IAM (Identity and Access Management) is a web service that helps you securely control access to AWS services and resources. It allows you to manage users, groups, roles, and permissions by controlling who can access which resources in your AWS environment and under what conditions.

Here’s a breakdown of key AWS IAM concepts:

1. Users: A user is an individual with a long-term set of credentials (such as a username and password or access keys). Users represent people or applications.
2. Groups: Groups allow you to apply permissions to multiple users at once. For example, you can create a "Developers" group and assign it permissions to interact with AWS resources relevant to development environments.
3. Roles: Roles are used to grant permissions to AWS services or applications without using permanent credentials. For instance, an EC2 instance can assume a role to access an S3 bucket.
4. Policies: Policies define what actions are allowed or denied for users, groups, or roles. These can be attached to users, groups, and roles to provide fine-grained access control to AWS services.
5. Multi-Factor Authentication (MFA): MFA adds an extra layer of protection to your IAM users by requiring a second factor (like a security token) in addition to a password.
6. Access Keys: These are long-term credentials for IAM users, typically used for programmatic access via AWS CLI or SDK.

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