Basic Terraform Commands

1. terraform init – Initializes a new or existing Terraform configuration.

2. terraform plan – Generates and shows an execution plan.

3. terraform apply – Builds or changes infrastructure.

4. terraform destroy – Destroys Terraform-managed infrastructure.

5. terraform fmt – Formats Terraform configuration files to a canonical style.

6. terraform validate – Validates the configuration files.

7. terraform output – Extracts and displays output values from the Terraform state.

8. terraform show – Provides human-readable output from a state or plan file.

9. terraform version – Displays the current Terraform version.

10. terraform providers – Lists Terraform providers required by the configuration.

Terraform State Management

1. terraform state list – Lists all resources in the Terraform state.

2. terraform state show <resource> – Shows the attributes of a resource in the Terraform state.

3. terraform state pull – Downloads and outputs the Terraform state in JSON format.

4. terraform state push – Uploads a local state file to a remote backend.

5. terraform state rm <resource> – Removes a resource from the Terraform state.

6. terraform state mv <source> <destination> – Moves resources within the state.

7. terraform state replace-provider <old-provider> <new-provider> – Replaces a provider in the state.

8. terraform refresh – Updates local state with real-world infrastructure.

9. terraform state pull > terraform.tfstate – Downloads and saves the state locally.

Terraform Workspaces

1. terraform workspace list – Lists all Terraform workspaces.

2. terraform workspace new <name> – Creates a new Terraform workspace.

3. terraform workspace select <name> – Switches to a different workspace.

4. terraform workspace delete <name> – Deletes a Terraform workspace.

5. terraform workspace show – Displays the current workspace.

Terraform Import

1. terraform import <resource_type>.<resource_name> <id> – Imports existing infrastructure into Terraform.

2. terraform import module.<module_name>.<resource_type>.<resource_name> <id> – Imports infrastructure into a specific module.

Terraform Graph and Visualization

1. terraform graph – Outputs a visual representation of the dependency graph.

2. terraform graph | dot -Tpng > graph.png – Converts the graph into a PNG file using Graphviz.

Terraform Plan and Apply Options

1. terraform apply -auto-approve – Applies changes without confirmation.

2. terraform apply -var="key=value" – Applies changes with overridden variables.

3. terraform apply -target=<resource> – Applies only the targeted resource.

4. terraform apply <plan_file> – Applies a saved plan file.

5. terraform plan -out=<plan_file> – Saves the execution plan to a file.

6. terraform plan -var="key=value" – Creates a plan with overridden variables.

7. terraform plan -target=<resource> – Generates a plan for the targeted resource.

8. terraform plan -destroy – Shows a plan to destroy all resources.

9. terraform plan -refresh=false – Skips refreshing the state when generating a plan.

10. terraform apply -refresh-only – Updates the state without changing any resources.

Variable Management

1. terraform apply -var-file=<file.tfvars> – Uses variables from a file.

2. terraform plan -var-file=<file.tfvars> – Creates a plan using variables from a file.

3. terraform apply -var="key=value" – Applies with a single variable override.

4. terraform plan -var="key=value" – Plans with a single variable override.

5. terraform apply -lock=false – Applies changes without locking the state.

6. terraform plan -input=false – Runs the plan without interactive input for variables.

Resource Taint and Untaint

1. terraform taint <resource> – Marks a resource for recreation in the next apply.

2. terraform untaint <resource> – Removes the tainted mark from a resource.

Remote State Management

1. terraform remote config – Configures remote state storage.

2. terraform backend -config=backend.tf – Specifies the backend configuration.

3. terraform state push – Uploads a local state file to the configured backend.

4. terraform state pull – Downloads the current state from the remote backend.

Provider Management

1. terraform providers schema – Displays the schema of providers used in the configuration.

2. terraform providers lock – Generates a lock file for providers.

3. terraform providers mirror <directory> – Copies providers to a specified directory.

4. terraform providers install – Installs the required providers locally.

5. terraform init -upgrade – Upgrades provider plugins to the latest versions.

Locking and Unlocking

1. terraform force-unlock <lock-id> – Manually unlocks the state for recovery.

2. terraform apply -lock-timeout=5m – Specifies a timeout for acquiring the state lock.

Terraform State Manipulation

1. terraform state push <file> – Pushes the given state file to the remote backend.

2. terraform state pull > file.tfstate – Pulls the current state to a local file.

3. terraform state replace-provider – Replaces the provider for resources in the state.

4. terraform state mv <old> <new> – Moves items within the state.

5. terraform state rm <resource> – Removes a specific resource from the state.

Debugging and Logging

1. TF_LOG=DEBUG terraform apply – Enables debug-level logging.

2. TF_LOG=INFO terraform plan – Enables info-level logging.

3. TF_LOG_PATH=<file> terraform apply – Redirects logging output to a file.

4. terraform validate -json – Validates the configuration and outputs in JSON format.

5. terraform console – Opens an interactive console for evaluating expressions.

6. terraform providers schema -json – Outputs the provider schema in JSON format.

Experimental Commands

1. terraform apply -replace=<resource> – Forces Terraform to replace a specific resource.

2. terraform plan -refresh=false – Skips refreshing the state before planning.

3. terraform destroy -target=<resource> – Destroys a specific resource.

Working with Modules

1. terraform get – Downloads and installs modules for the configuration.

2. terraform get -update – Updates modules to the latest versions.

3. terraform init -get=true – Re-fetches the required modules.

4. terraform init -get-plugins – Downloads necessary provider plugins.

Backups and Rollbacks

1. terraform state snapshot – Creates a backup of the current state.

2. terraform state restore <backup-file> – Restores the state from a backup file.

3. terraform apply -backup=<backup-file> – Specifies a backup file before applying changes.

Automation and Scripting

1. terraform apply -auto-approve – Runs apply without confirmation.

2. terraform plan -detailed-exitcode – Returns a detailed exit code for use in CI/CD.

3. terraform apply -parallelism=<N> – Limits the number of parallel resource operations.

Workspace Commands

1. terraform workspace list – Lists available workspaces.

2. terraform workspace new <name> – Creates a new workspace.

3. terraform workspace select <name> – Switches to a specific workspace.

4. terraform workspace delete <name> – Deletes a workspace.

5. terraform workspace show – Displays the current workspace.

Remote Backend and Collaboration

1. terraform login – Authenticates to Terraform Cloud/Enterprise.

2. terraform logout – Logs out of Terraform Cloud/Enterprise.

3. terraform init -backend-config=<config> – Initializes the backend with a specific configuration.

Resource Manipulation

1. terraform apply -replace=<resource> – Forces a specific resource to be replaced.

2. terraform taint <resource> – Marks a resource as tainted for recreation.

3. terraform untaint <resource> – Removes the tainted status from a resource.

Miscellaneous

1. terraform init -force-copy – Forces copying of state data on reinitialization.

2. terraform init -reconfigure – Reconfigures backend settings on initialization.

3. terraform plan -compact-warnings – Hides warnings during the plan.

4. terraform state show <resource> – Shows the state of a specific resource.

5. terraform refresh – Updates the state to match real-world infrastructure.

6. terraform login – Authenticates to Terraform Cloud/Enterprise.

7. terraform fmt -recursive – Recursively formats all .tf files in a directory.

8. terraform force-unlock <lock-id> – Manually unlocks the state for recovery.