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- 01Getting Started
- 02What Is Terraform?
- 03Checking the Version with terraform version
- 04What Is Infrastructure as Code?
- 05What Is a Provider?
- 06Preparing Providers with terraform init
- 07What Is a Resource Block?
- 08Checking Syntax with terraform validate
- 09Formatting Code with terraform fmt
- 10Previewing Changes with terraform plan
- 11Building Infrastructure with terraform apply
- 12What Is tfstate?
- 13Viewing State with terraform show
- 14Listing Resources with terraform state list
- 15Inspecting One Resource with terraform state show
- 16What Are Variables?
- 17What Are Outputs?
- 18Reading Outputs with terraform output
- 19Tearing Down with terraform destroy
- 20What Is a Module?
- 21What Is a Workspace?
- 22Listing Workspaces with terraform workspace list
- 23Creating a Workspace with terraform workspace new
- 24Switching Workspaces with terraform workspace select
- 25Saving a Plan with terraform plan -out
- 26Applying a Saved Plan with terraform apply
- 27What Is State Locking?
- 28Listing Providers with terraform providers
- 29What Is terraform refresh?
- 30What Is a Remote Backend?
- 31Adopting Existing Resources with terraform import
- 32What Is depends_on?
- 33What Are for_each and count?
- 34Visualising Dependencies with terraform graph
- 35What Is State Drift?
- 36How to Think About Splitting Modules
- 37Hands-On: Building a Three-Tier Web Architecture with Terraform
What Is Infrastructure as Code?
Infrastructure as Code (IaC) means managing infrastructure the way you manage software: written down, versioned, reviewed.
Manual setup through a console is fast the first time and unreproducible ever after — nobody remembers exactly which checkboxes were ticked. IaC removes that guesswork.
Because the definition is a file, you get code review, history, and the ability to rebuild the same environment in a different region or account on demand.
A common stumble is expecting IaC to be quicker for one small change. It is slower for the first click and enormously faster from the tenth onward, which is the whole point.
In real work, IaC is what makes staging genuinely resemble production, and what makes disaster recovery a command rather than an archaeology project.
🧑💻 You can type this command into the Terraform pseudo terminal to try it yourself (this page itself has no interactive terminal).