SSH Key is an access credential for the SSH network protocol. SSH is used for remote file transfer, network management, and remote operating system access. The tls_private_key resource is used to create a SSH key in Terraform.

Terraform allows you to describe your complete infrastructure in the form of code. Even if your servers come from different providers such as AWS, Terraform helps you build and manage these resources in parallel across providers.

Configure Terraform to use the AWS credential file: You can configure Terraform to use the AWS credential file by setting the AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY environment variables to the values in the credential file.

The "cannot decode dynamic from flatmap" error message typically occurs when there is a mismatch between the remote state that Terraform expects to find and the actual state stored in the backend.

To pass multiple bootstrap actions in AWS EMR using Terraform, you can use the bootstrap_action block multiple times within your EMR cluster resource.

Terraform is an open source command line tool for building, changing, and versioning in your cloud platform, it supports popular cloud providers including Amazon AWS, Google Cloud, Microsoft Azure and Clouds.