The terraform apply command is used to apply the modifications needed either to reach the desired state of the configuration or the pre-determined set of actions generated as per the terraform plan execution plan.
terraform apply [options] [dir-or-plan]
By default, Terraform apply scans the current directory for the configuration and applies the appropriate changes. Also, we can provide a path to another configuration or an execution plan.
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Also, watch this video on AWS services with Terraform: