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Cloud Computing · Intermediate

AWS Systems Manager (SSM)

AWS operations hub for managing EC2 and on-premises servers: patching, remote commands, sessions, inventory, parameters and automation.

Definition

Systems Manager capabilities include Session Manager (shell access without SSH or bastions), Run Command, Patch Manager, State Manager, Inventory, Automation runbooks, Parameter Store and Fleet Manager. Managed nodes require the SSM Agent and an IAM instance profile with the necessary permissions.

Example

Patch Manager applies critical OS patches to all Windows instances tagged PatchGroup=prod during a maintenance window.

Exam tip

Session Manager eliminates opening port 22 and managing SSH keys, with sessions logged to S3 or CloudWatch Logs.

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