Terraform aws basic file to create an instance with security group attached and to create a securrity group

main.tf

provider "aws"{
region = "us-west-2"
access_key = "<access_key_aws>"
secret_key = "<secret_key_aws>"
}

resource "aws_instance" "myfirst"{
  ami           = "ami-0a7d051a1c4b54f65"
  instance_type = "t2.micro"
  key_name = "<key_pair_aws>"
  security_groups = ["<secuirty_group_aws>"]
}

resource "aws_security_group" "allow_all"{
 name = "allow_all"
 description = "Allow all inbound traffic"
 vpc_id = "<vpc_id_aws>"
 ingress {
   from_port = 0
   to_port = 0
   protocol = "-1"
   cidr_blocks = ["0.0.0.0/0"]
 }
 
 egress {
   from_port = 0
   to_port = 0
   protocol = "-1"
   cidr_blocks = ["0.0.0.0/0"]
 }
}

terraform init --> to download aws provider files if not there.
terraform validate --> to check tf file
terraform plan --> to see what happens
terraform apply --> to deploy the changes