Cfn-lint file with your stack.yml
cfn-lint file_with_your_stack.yml E0000 mapping values are not allowed in this context file_with_your_stack.yml:5:23
cfn-lint RDS_snippets.cf E1001 Top level template section MyDB is not valid RDS_snippets.cf:1:1 E1001 Missing top level template section Resources RDS_snippets.cf:1:1 E1012 Ref MyDbSecurityByEC2SecurityGroup not found as a resource or parameter RDS_snippets.cf:5:7 E1012 Ref MyDbSecurityByCIDRIPGroup not found as a resource or parameter RDS_snippets.cf:6:7
See also
cfn-lint,cfn-lint --help- AWS CloudFormation: [
aws cloudformation|create-stack|list-stacks|delete-stack|update-stack|list-types|estimate-template-cost|validate-template|describe-stacks|deploy|drift detection],aws cloudformation get-template-summary, aws cloudformation describe-stack-events - AWS CloudFormation,
AWS::CloudFormationAWS CloudFormation Designer, Drift detection, AWS Cloud Development Kit (CDK),aws cloudformation,ServicesStack:, AWS CloudFormation Linter (cfn-lint), Former2, CloudCraft, Change sets, AWS CloudFormation Public Registry, CloudFormation snippets, CloudFormation templates, StackSets,Outputs:,Type:,Fn::Sub,!Ref, CloudFormation Parameters, AWS CloudFormation Templates, CloudFormation functions
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