What problem does it solve? Amazon EFS file systems can fail to mount, deny access, or perform slowly for many different reasons, and finding the root cause requires checking security groups, IAM policies, NFS clients, KMS keys, and VPC DNS settings. This Skill provides a structured diagnostic workflow that classifies symptoms and walks through the exact AWS CLI commands needed to identify and fix each category of EFS issue. ## Core Features & Use Cases - Symptom Classification: Maps common error messages like "wrong fs type", "access denied by server", and connection timeouts to six distinct root-cause categories. - Guided Remediation: Provides step-by-step AWS CLI commands for fixing security group rules, IAM file system policies, burst credit exhaustion, KMS key issues, and VPC DNS settings. - Use Case: An EC2 instance hangs for two minutes and then times out when mounting an EFS file system. The Skill identifies this as a network/security group issue, checks that the mount target's security group allows inbound TCP 2049 from the instance's security group, and applies the missing ingress rule. ## Quick Start Diagnose why my EFS file system fs-12345678 fails to mount on my EC2 instance with a connection timeout error.
