EC2 Overview

EC2 Instances

actual virtual machine
It has memory cpu os inside it

Elastic IPs

gives you static ip ( not auto assigned )
you can assign that to any EC2 instance you created

Connect with Instance

SSH - Port 22 in inbound rule of SG
You need .pem key

ssh -i "key_path.pem" ubuntu@ec2-3-4-177.ap-south-1.compute.amazonaws.com

you can use your instance remotely
Inbound rule for port 22 from Anywhere required