Describes the cause and action for error messages.
Error Message(English)：
security group not showing
Security Group Basics
https://docs.aws.amazon.com/vpc/latest/userguide/VPC_SecurityGroups.html#VPCSecurityGroups
Default Security Group for ...
https://docs.aws.amazon.com/vpc/latest/userguide/VPC_SecurityGroups.html#DefaultSecurityGroup
Security Group Rules
https://docs.aws.amazon.com/vpc/latest/userguide/VPC_SecurityGroups.html#SecurityGroupRules
Why can't I delete a security group for my ... - AWS - Amazon.com
https://aws.amazon.com/premiumsupport/knowledge-center/troubleshoot-delete-vpc-sg/
AWS Developer Forums: IAM admin user not able to see running ...
https://forums.aws.amazon.com/thread.jspa?threadID=245357
Network Load Balancers don't have ...
https://forums.aws.amazon.com/thread.jspa?threadID=263245
How to change security group for ...
https://forums.aws.amazon.com/thread.jspa?threadID=78175
How to find Unused Amazon EC2 Security groups - Stack Overflow
https://stackoverflow.com/questions/24685508/how-to-find-unused-amazon-ec2-security-groups
Cannot ping AWS EC2 instance
https://stackoverflow.com/questions/21981796/cannot-ping-aws-ec2-instance