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

1
Ensure your private key file has restricted permissions (chmod 400).
2
The instance must have a public IP or be accessible via a bastion host.
3
Port 22 must be open in the associated Security Group.
4
Use the appropriate user for your AMI (e.g., ec2-user, ubuntu, admin).