Terraform Commands

Initialize Terraform:
```
 terraform init
```
- Initializes the working directory containing Terraform configuration files. This command downloads the necessary provider plugins.
Validate Terraform configuration:
```
 terraform validate
```
- Checks the syntax and validity of the Terraform configuration files.
Create or update infrastructure:
```
 terraform apply
```
- Applies the changes specified in the Terraform configuration to create or update the infrastructure.
Show Terraform execution plan:
```
 terraform plan
```
- Generates and shows an execution plan without making any actual changes to the infrastructure. Useful for reviewing changes before applying them.
Destroy infrastructure:
```
 terraform destroy
```
- Destroys the infrastructure defined in the Terraform configuration files. Use with caution, as it will remove all resources.
Output values:
```
 terraform output
```
- Displays the output values defined in the Terraform configuration.
Import existing resources into Terraform:
```
 terraform import <resource_type>.<resource_name> <resource_id>
```
- Imports an existing resource into Terraform state. This helps manage resources that were created outside of Terraform.

Workspace management:

 terraform workspace new <workspace_name>
 terraform workspace select <workspace_name>
 terraform workspace list
 terraform workspace delete <workspace_name>

Manages workspaces, allowing you to have multiple isolated instances of your infrastructure.

State management:
```
 terraform state show
 terraform state list
 terraform state pull
 terraform state push
```
- Manages Terraform state, which is used to track the current state of your infrastructure.
Format Terraform Files:
- To format your Terraform configuration files.
```
  terraform fmt
```

Variables and Input:

We can use variables to make our configurations dynamic. It's like parameters that we can change depending on the situation.

    variable "region" {
      default = "us-west-2"
    }

Module Usage:

Modules help us organize our code and reuse configurations. Think of them as building blocks for our infrastructure.

    module "vpc" {
      source = "./modules/vpc"
    }

Conditional Resources:

We can create resources conditionally based on certain criteria. It's like saying 'only create this if something else is true.'

    "aws_instance" "example" {
      count = var.create_instance ? 1 : 0
      // Other instance configurations
    }

Happy Learning !!