EC2 Concepts
Amazon Machine Image (AMI)
- In AWS EC2 instances can be created with preconfigured templates which contain OS and other softwares, These Preconfigured templates are called as AMIs
- Each AMI will have an ID, Same AMI if copied to Different Region will have a new ID
- Every AMI will have an Operating System
- AMI Types (With Permission):
- Public: These AMI’s can be used by all AWS accounts
- Explicit: These AMI’s can be launched only by few accounts to whom permission is granted
- Implicit: These AMI’s can be launched by the owner
- AMI Types
- Amazon Provided
- Marketplace:
- Allows third parties to sell there Os or applications
- They might impose extra costs
- Custom:
- Created by individual users
- Storage for the Root Device:
- Size Limit
Instance Type basics
- Instance Type describes the following
- CPU
- RAM
- Network Performance
- Instance Store
- t2.micro is a free for 750 hours/month (in a free tier plan)
- Tracking free tier usage Click here
Key Pair
- Key pairs are used to login into ec2 instances
- Amazon uses RSA algorithm
- Amazon can allow importing the keys
Login into Linux Machine
- Older versions of Windows : Install Git Bash from here
- Linux/Mac: Already have a Terminal
- Windows 10 Latest Update: Use Powershell.
