create directory ec2 and navigate to the directory
$ mkdir ec2 && cd ec2
create main.tf file
$ vim main.tf

provider "aws" {
  region = "ap-south-1"
}

resource "aws_instance" "app_server" {
  ami = "ami-03f4878755434977f"
  instance_type = "t2.nano"
  subnet_id = "subnet-0ccba3b8cfd0645e2"
  key_name = "awskey"
  associate_public_ip_address = "true"
  tags = {
    Name = "demo-server"
  }
}

output "public_ip" {
  description = "public ip of the instance"
  value = aws_instance.app_server.public_ip
}

save and exit
initialize the terraform
$ terraform init
$ terraform plan
$ terraform apply -auto-approve
it will create the AWS EC2 instance with output the public ip of the instance

To destroy the instance
$ terraform destroy -auto-approve

Method1: Package manager
$ wget -O- https://apt.releases.hashicorp.com/gpg | sudo gpg –dearmor -o /usr/share/keyrings/hashicorp-archive-keyring.gpg
$ echo “deb [signed-by=/usr/share/keyrings/hashicorp-archive-keyring.gpg] https://apt.releases.hashicorp.com $(lsb_release -cs) main” | sudo tee /etc/apt/sources.list.d/hashicorp.list
$ sudo apt update && sudo apt install terraform
$ terraform version
To get help options
$ terraform -h

Method2: Binary download
download the binary from wget https://developer.hashicorp.com/terraform/downloads
$ wget https://releases.hashicorp.com/terraform/1.6.6/terraform_1.6.6_linux_amd64.zip

extract using unzip
$ unzip terraform_1.6.6_linux_amd64.zip
$ mv terraform /usr/local/bin/
$ terraform version
$ terraform -h

To remove terraform binary method
$ sudo rm -f /usr/local/bin/terraform

To remove terraform package manager method
$ sudo apt remove terraform --purge