How can you restore an EC2 instance from an EBS snapshot in AWS?

To restore an EC2 instance from a snapshot, several prerequisites must be met. You need an AWS account, an existing EC2 environment, and a valid snapshot of the EBS volume associated with the original instance .

The restoration process typically follows these steps:

1. In the AWS Management Console, locate the desired snapshot. 2. Select Create image from snapshot, configure the necessary settings, and generate a new Amazon Machine Image (AMI) . 3. Navigate to the EC2 dashboard and select Launch instance. 4. Under My AMIs, choose the newly created AMI, configure instance details, and launch the new EC2 instance .

Once the instance is launched, you can connect using SSH for Linux instances or RDP for Windows instances, typically using the same key pair or credentials as the original system .

The time required for restoration depends on snapshot size and region, but creating a new volume or AMI from a snapshot is generally efficient. It is important to note that deleting a snapshot removes only the unique data blocks not referenced by other snapshots .

This method provides a practical way to recover systems while maintaining data persistence through EBS volumes.