The <<-EOF and EOF are Terraform's heredoc syntax, This syntax enables the creation of multiline strings in Terraform configuration files without the need to manually insert newline characters (\n).

To check if an instance is running using Terraform, you can use the following command: terraform show This command displays the current state of your infrastructure as recorded by Terraform. It will show information about the resources that Terraform has created, including details about the EC2 instance, such as its ID, IP address, and other attributes.

If we want to create an instance in different regions within the same Terraform file, we need to use provider aliases. In Terraform, a single file typically contains one default provider configuration for ‘aws.’ To work with multiple regions, we use provider aliases. Instead of having two separate provider blocks, we add aliases to them. For example:

hcl
provider "aws" {
  alias  = "us-east-2"
  region = "us-east-2"
}

resource "aws_instance" "example" {
  provider       = aws.us-east-2
  ami            = "ami-id"
  instance_type  = "t2.micro"
}

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

resource "aws_instance" "example1" {
  provider       = aws.us-east-1
  ami            = "ami-id"
  instance_type  = "t2.micro"
}

This way, we can create instances in different regions using a single Terraform file, and each instance is associated with its respective region through the use of provider aliases

how to troubleshoot the visibility of an AWS EC2 instance. discovered that instances may not appear in the console if deployed in a different region , verified instance existence by providing the correct region in the AWS console. example:

provider "aws" {
 region = "us-east-2"
}

if you are using ngrok to expose your localhost , you can serve that in a static domain. Every time you start ngrok it will use the same domain name

ngrok http --domain=&lt;your-domain&gt;.<http://ngrok-free.app|ngrok-free.app> &lt;port&gt;

setup tailwind css without using node.js The below setup is for macOS arm64

Step1

curl -sLO <https://github.com/tailwindlabs/tailwindcss/releases/latest/download/tailwindcss-macos-arm64>
chmod +x tailwindcss-macos-arm64
mv tailwindcss-macos-arm64 tailwindcss

Step2

./tailwindcss init // this will create tailwind.config.js file

Step3 Create input.css file and import the required tailwind base, components & utilities

Step4

./tailwindcss -i input.css -o output.css --watch // this will generate a output.css file, so make sure to link it in your root file

For production add the tailwind watcher command with --minify flag

./tailwindcss -i input.css -o output.css --minify

ChatGPT 4.0 has a limit of 40 messages per 3 hours while using some of the custom GPTs like DALL·E

touch filename : Used to create an empty file . git remote : The command is used to manage remote repositories. git reset HEAD~1 : Removes the most recent commit from the current branch without modifying the working directory. git pull origin branch_name : Fetches changes from the specified branch (branch_name) on the origin remote repository.

Activerecord validations & callbacks are not called when upsert_all or insert_all are used. They will be directly converted to raw sql queries and executed