Amazon Machine Images (AMI)

Even though there are so many EC2 instance types to choose from, the number of instance types pales compared to the number of Amazon Machine Images (AMIs) available. An AMI contains the information needed to start an instance. An AMI needs to be specified when launching an instance.

The chosen AMI will determine the characteristics of the EC2 instance, such as the following:

• Operating system: The currently supported operating systems are as follows:

1. Ubuntu
2. Amazon Linux
3. CentOS
4. Debian
5. Red Hat Enterprise Linux
6. FreeBSD
7. SUSE
8. Fedora
9. Gentoo
10. macOS
11. Mint
12. OpenSolaris
13. Windows Server

• Architecture: The architecture that will be used:

1. 64-bit (Arm)
2. 32-bit (x86)
3. 64-bit (x86)
4. 64-bit (Mac)

• Launch permissions: The launch permissions will determine when and where the AMI can be used:

1. Public: All AWS accounts can launch this AMI.
2. Explicit: Only specific AWS accounts can launch the AMI.
3. Implicit: Implicit launch permission is given to launch the AMI.

• Root device storage...