Terraform is an open-source infrastructure as code software tool created by HashiCorp. It allows you to define and provision data center infrastructure using a declarative configuration language. In this guide, we will walk through the steps to use the Terraform CLI on Ubuntu.

Step 1: Install Terraform

First, ensure your system is up to date:

sudo apt update && sudo apt upgrade -y

Next, download the latest version of Terraform:

wget https://releases.hashicorp.com/terraform/1.5.0/terraform_1.5.0_linux_amd64.zip

Unzip the downloaded file:

sudo apt install unzip
unzip terraform_1.5.0_linux_amd64.zip

Move the Terraform binary to the /usr/local/bin directory:

sudo mv terraform /usr/local/bin/

Verify the installation:

terraform -v

Step 2: Configure Your Terraform Project

Create a directory for your Terraform project:

mkdir ~/my-terraform-project
cd ~/my-terraform-project

Create a file called main.tf:

nano main.tf

In this file, you can define your infrastructure. Here’s an example configuration:

provider "aws" {
  region = "us-east-1"
}

resource "aws_instance" "example" {
  ami           = "ami-0c55b159cbfafe1f0"
  instance_type = "t2.micro"
}

Step 3: Initialize Your Terraform Project

Run the following command to initialize your project. This command downloads the necessary provider plugins:

terraform init

Step 4: Plan Your Changes

Before applying any changes, you can see what Terraform will do by running:

terraform plan

Step 5: Apply Your Changes

To create the infrastructure defined in your configuration file, run:

terraform apply

You will be prompted to confirm the action. Type yes to proceed.

Step 6: Manage Your Infrastructure

To see the current state of your infrastructure, use:

terraform show

If you want to destroy the resources you created, run:

terraform destroy

Conclusion

You have successfully installed and learned how to use the Terraform CLI on Ubuntu. This powerful tool will help you manage your infrastructure as code effectively.

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