2th of 3 Questions.
How to connect to an EC2 instance using SSH?
SSH Connection Process
Connecting via SSH is the standard method for managing Linux-based EC2 instances. You must have the private key (.pem file) generated during instance creation to authenticate securely.
SSH Command
Requirements
Ensure your private key file has restricted permissions (chmod 400).
The instance must have a public IP or be accessible via a bastion host.
Port 22 must be open in the associated Security Group.
Use the appropriate user for your AMI (e.g., ec2-user, ubuntu, admin).