# Terraform
Terraform is a free and open-source infrastructure as code automation tool, to provision, change, and version resources on any environment.

Project Homepage: [Terraform by HashiCorp](https://www.terraform.io/)
Documentation: [Documentation | Terraform by HashiCorp](https://www.terraform.io/docs)
TF Registry: [Terraform Registry](https://registry.terraform.io/)

## Format and Validate
COMMAND | DESCRIPTION
---|---
`terraform fmt` | Reformat your configuration in the standard style
`terraform validate` | Check whether the configuration is valid
## Initialize Working Directory
COMMAND | DESCRIPTION
---|---
`terraform init` | Prepare your working directory for other commands
## Plan, Deploy and Cleanup
COMMAND | DESCRIPTION
---|---
`terraform apply --auto-approve` | Create or update infrastructure without confirmation prompt
`terraform destroy --auto-approve` | Destroy previously-created infrastructure without confirmation prompt
`terraform plan -out plan.out` | Output the deployment plan to plan.out
`terraform apply plan.out` | Use the plan.out to deploy infrastructure
`terraform plan -destroy` | Outputs a destroy plan
`terraform apply -target=aws_instance.myinstance` | Only apply/deploy changes to targeted resource
`terraform apply -var myregion=us-east-1` | Pass a variable via CLI while applying a configuration
`terraform apply -lock=true` | Lock the state file so it can't be modified
`terraform apply refresh=false` | Do not reconcile state file with real-world resources
`terraform apply --parallelism=5` | Number of simultaneous resource operations
`terraform refresh` | Reconcile the state in Terraform state file with real-world resources
`terraform providers` | Get informatino about providers used in the current configuration
## Workspaces
COMMAND | DESCRIPTION
---|---
`terraform workspace new myworkspace` | Create a new workspace
`terraform workspace select default` | Change to a workspace
`terraform workspace list` | List all workspaces
## State Manipulation
COMMAND | DESCRIPTION
---|---
`terraform state show aws_instance.myinstance` | Show details stored in the Terraform state file
`terraform state pull > terraform.tfstate` | Output Terraform state to a file
`terraform state mv aws_iam_role.my_ssm_role module.mymodule` | Move a resource tracked via state to different module
`terraform state replace-provider hashicorp/aws registry.custom.com/aws` | Replace an existing provider with another
`terraform state list` | List all resources tracked in the Terraform state file
`terraform state rm aws_instance.myinstance` | Unmanage a resource, delete it from the Terraform state file
## Import and Outputs
COMMAND | DESCRIPTION
---|---
`terraform import resourcetype.myresource <id>` | Import a Resource
`terraform output` | List all outputs
`terraform output <output>` | List a specific output
`terraform output -json` | List all outputs in JSON format
## Terraform Cloud
COMMAND | DESCRIPTION
---|---
`terraform login` | Login to Terraform Cloud with an API token
`terraform logout` | Logout from Terraform Cloud

## Import existing resources