Update README.md

Author: LondheShubham153

README.md

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 # terraform-for-devops
 This repository is your one stop solution for Terraform for DevOps Engineers 
+
+# Terraform Commands - Complete Guide
+
+## **1. Setup & Initialization**
+### **Install Terraform**
+```sh
+# Linux & macOS
+curl -fsSL https://apt.releases.hashicorp.com/gpg | sudo apt-key add -
+sudo apt-add-repository "deb [arch=amd64] https://apt.releases.hashicorp.com $(lsb_release -cs) main"
+sudo apt-get update && sudo apt-get install terraform
+
+# Verify Installation
+terraform -v
+```
+
+### **Initialize Terraform**
+```sh
+terraform init
+```
+- Downloads provider plugins
+- Sets up the working directory
+
+## **2. Terraform Core Commands**
+### **Format & Validate Code**
+```sh
+terraform fmt       # Formats Terraform code
+terraform validate  # Validates Terraform syntax
+```
+
+### **Plan & Apply Infrastructure**
+```sh
+terraform plan      # Shows execution plan without applying
+terraform apply     # Creates/updates infrastructure
+terraform apply -auto-approve  # Applies without manual confirmation
+```
+
+### **Destroy Infrastructure**
+```sh
+terraform destroy  # Destroys all managed resources
+terraform destroy -auto-approve  # Without confirmation
+```
+
+## **3. Managing Terraform State**
+### **Check Current State**
+```sh
+terraform state list  # Lists all managed resources
+terraform show        # Shows detailed resource info
+```
+
+### **Manually Modify State**
+```sh
+terraform state mv <source> <destination>  # Move resource in state file
+terraform state rm <resource>  # Removes resource from state (not from infra)
+```
+
+### **Remote Backend (S3 & DynamoDB)**
+```hcl
+terraform {
+  backend "s3" {
+    bucket         = "my-terraform-state"
+    key            = "global/s3/terraform.tfstate"
+    region         = "us-east-1"
+    dynamodb_table = "terraform-lock"
+    encrypt        = true
+  }
+}
+```
+```sh
+terraform init  # Reinitialize with remote backend
+```
+
+## **4. Variables & Outputs**
+### **Define & Use Variables**
+```hcl
+variable "instance_type" {
+  default = "t2.micro"
+}
+resource "aws_instance" "web" {
+  instance_type = var.instance_type
+}
+```
+
+### **Pass Variables in CLI**
+```sh
+terraform apply -var="instance_type=t3.small"
+```
+
+### **Output Values**
+```hcl
+output "instance_ip" {
+  value = aws_instance.web.public_ip
+}
+```
+```sh
+terraform output instance_ip
+```
+
+## **5. Loops & Conditionals**
+### **for_each Example**
+```hcl
+resource "aws_s3_bucket" "example" {
+  for_each = toset(["bucket1", "bucket2", "bucket3"])
+  bucket   = each.key
+}
+```
+
+### **Conditional Expressions**
+```hcl
+variable "env" {}
+resource "aws_instance" "example" {
+  instance_type = var.env == "prod" ? "t3.large" : "t2.micro"
+}
+```
+
+## **6. Terraform Modules**
+### **Create & Use a Module**
+```sh
+mkdir -p modules/vpc
+```
+```hcl
+# modules/vpc/main.tf
+resource "aws_vpc" "main" {
+  cidr_block = "10.0.0.0/16"
+}
+```
+```hcl
+# Root module
+module "vpc" {
+  source = "./modules/vpc"
+}
+```
+```sh
+terraform init
+terraform apply
+```
+
+## **7. Workspaces (Environment Management)**
+### **Create & Switch Workspaces**
+```sh
+terraform workspace new dev
+terraform workspace new prod
+terraform workspace select prod
+terraform workspace list
+```
+
+## **8. Terraform Debugging & Logs**
+```sh
+export TF_LOG=DEBUG  # Enable debug logs
+terraform apply 2>&1 | tee debug.log  # Save logs
+```
+
+---
+
+## Projects
+
+### Terraform with Ansible
+[Get it here](https://github.com/LondheShubham153/terraform-ansible-multi-env)
+
+### Terraform with GitHub
+[Get it here](https://github.com/Amitabh-DevOps/online_shop/tree/github-action/.github/workflows)
+
+### Terraform to EKS
+[Get it here](https://github.com/DevMadhup/Springboot-BankApp/tree/DevOps/Terraform/EKS-Deployment)
+
+## **Final Thoughts**
+This README covers all the Terraform commands needed for your **"Terraform in One Shot"** video. Let me know if you need modifications or extra details! 🚀
+
+