• main.tf
• terraform.tfstate - state file
• myvars.tfvars - Variables file

• terrafrom init
• terraform plan
• terraform apply
  • terraform apply -replace aws_security_group.foo (Recreates resource during next apply)
• terraform output
  • terraform output --json
• terraform graph
  • terraform graph | dot -T svg > graph.svg
• terraform show (shows statefile in human readable format)
• terraform state list
  • terraform state show ADDR
  • terraform state mv
  • terraform state rm NAME (remove from being managed by terraform)
• terraform import
• terraform refresh
• terraform state pull
  • terraform state push state.tfstate
• terraform workspace [new, list, show, select and delete]

Destroy

• Remove the resource not needed in the config file. and then do apply

Resources represent the infrastructure that Terraform should create, read, update, Meta Arguments Resources support the following meta-arguments that can be used to change their behavior:

• depends_on - Define explicit dependencies.
• count - Create multiple resources using indexes.
• for_each - Create multiple resources using uniquely named keys.
• provider - Use a specific aliased provider.
• lifecycle - Customize the resource lifecycle.
• provisioner - Provision a given resource after creation or destruction.

Data Sources. Data sources are a special kind of Terraform resource that reads information from the target API and exposes that information for use within your Terraform configuration.

Data sources can be used for a number of reasons; but their goal is to do something and then give you data. It will instead just give you information, and not create anything. This example in particular will call out to the describe-images AWS API call, pass in a few --filter options as specified, and return an object that you can get information from - take a look at these attributes!

Fetches information from aws/azure/ by applying filters.

• local-exec
• remote-exec
• file
• null_resource