Terraform

General
terraform get -update=true	download and update root modules
terraform fmt	format project code to HCL standards
terarform validate	validate terraform syntax
terraform providers	show information about providers requirements
terraform login & logout	login & logout to terraform cloud

Init
terraform init	initialize terraform in the current working directory
terraform init -upgrade	upgrade modules and plugins at initialization
terraform init -migrate-state -force-copy	update backend configuration
terraform init -backend-config=FILE	use local backend configuration
terraform init -lock-timeout=120s	change state lock timeout

Plan
terraform plan	produce a plan with diff between project and state
terraform plan -out filename.tfplan	output a plan file for reference during apply
terraform plan -destroy	output a plan to show effect of terraform destroy

Apply
terraform apply	apply the current state of terraform code
terraform apply filename.tfplan	specify a previously generated plan to apply
terraform apply -auto-approve	enable auto-approval or automation (for ci/cd)

State
terraform state list	list all resources in terraform state
terraform state show ADDRESS	show details about a specific resource
terraform state mv SOURCE DESTINATION	move an existing resource in state under new name
terraform state import ADDRESS	import a manually created resource into state (resource block should exists)
terraform state pull > terraform.tfstate	pull state and save to a local file
terraform taint ADDRESS	taint a resource to force redeployment on apply
terraform untaint ADDRESS	untaint a previously tainted resource

Outputs
terraform output	list available outputs
terraform output OUTPUT_NAME	output a specific value

Workspaces
terraform workspace list	list the available workspaces
terraform workspace new WORKSPACE_NAME	create a new workspace
terraform workspace select WORKSPACE_NAME	select an existing workspace