Terraform is a tool for building, changing, and versioning infrastructure safely and efficiently. Terraform can manage existing and popular service providers as well as custom in-house solutions.

1. Download the latest version of Terraform from here.
2. Unzip the downloaded file.
3. Move the executable file to /usr/local/bin/.
4. Run terraform --version to verify the installation.
5. Done!

Create a directory for your Terraform configuration files.

Create a file named main.tf in the directory you created in step 1.

Run terraform init to initialize Terraform.

Run terraform plan to create a Terraform execution plan.

Run terraform apply to apply the Terraform execution plan.

Run terraform destroy to destroy Terraform resources.

1. Go to AWS IAM.
2. Click on Users in the left sidebar.
3. Click on Add user.
4. Enter a name for the user.
5. Select Programmatic access.
6. Click on Next: Permissions.
7. Select Attach existing policies directly.
8. Select AdministratorAccess. (This is not recommended for production environments.)
9. Click on Next: Tags.
10. Click on Next: Review.
11. Click on Create user.
12. Copy the Access key ID and Secret access key to a safe place.
13. set aws cli credentials using aws configure command.

1. Create s3 bucket for remote state. (e.g. terraform-remote-state) using aws s3api create-bucket --bucket terraform-remote-state-0001 --region us-east-1 --create-bucket-configuration LocationConstraint=ap-south-1
2. Create a DynamoDB table for state locking. (e.g. terraform-state-lock) using aws dynamodb create-table --table-name terraform-state-lock --attribute-definitions AttributeName=LockID,AttributeType=S --key-schema AttributeName=LockID,KeyType=HASH --provisioned-throughput ReadCapacityUnits=1,WriteCapacityUnits=1
3. in main.tf file add following code

terraform {
  backend "s3" {
    bucket         = "terraform-remote-state"
    key            = "terraform.tfstate"
    region         = "us-east-1"
    dynamodb_table = "terraform-state-lock"
  }
}

4. other terraform commands will work as usual.