Tool cheatsheet

Terraform 1 Cheatsheet

Write, plan, apply and manage infrastructure as code with the Terraform CLI.

Core workflow

Check the Terraform version — Print the Terraform version and the provider versions in use.
Initialize a working directory — Download providers and modules and set up the backend. Run it first and after changing providers.
Upgrade providers — Install the newest provider versions allowed by your version constraints.
Format the code — Rewrite configuration files into the canonical style, including subfolders.
Validate the configuration — Check the configuration for syntax and consistency errors.
Preview changes — Show what Terraform would create, change or destroy.
Save a plan to a file — Save the plan so you can apply exactly what you reviewed.
Apply changes — Create or update infrastructure after you confirm the plan.
Apply a saved plan — Apply a plan file without a further prompt.
Destroy all managed infrastructure — Delete everything the configuration manages.
Apply without confirmation — Skip the approval prompt, as CI pipelines do.

Set a variable — Pass a value for an input variable.
Use a variable file — Load variable values from a file.
Apply a single resource — Limit the run to one resource and what it depends on.
Force a resource to be recreated — Destroy and recreate a resource. This replaces the old taint command.
Show outputs — Print all of the configuration's output values.
Read one output as a plain value — Print a single output without quotes, handy in scripts.
Open an expression console — Try expressions and inspect values interactively.

List resources in state — Show every resource Terraform tracks.
Show a resource in state — Print the recorded attributes of one resource.
Rename a resource in state — Move a resource to a new address, for example after renaming it in code.
Forget a resource — Stop tracking a resource without destroying it.
Import an existing resource — Bring a resource that already exists under Terraform's management, here an S3 bucket.
Sync state with reality — Update the state to match real infrastructure without changing anything.
Release a stuck state lock — Remove a lock that a crashed run left behind, using the lock ID from the error.

List workspaces — Show workspaces; the current one is starred.
Create a workspace — Create and switch to a new workspace with its own state.
Switch workspace — Switch to an existing workspace.
List required providers — Show the providers the configuration needs.
Draw the dependency graph — Output the graph in DOT format; render it with Graphviz.
Log in to HCP Terraform — Get an API token for remote runs and the private registry.

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