In order to view what Azure virtual machines are existing within your subscription or, in this case, a particular resource group, you can use:

az vm list --resource-group YourResourceGroup -o table

In order to create an Azure virtual machine, let’s say Ubuntu, you can use:

az vm create --name YourVMName --resource-group YourResourceGroup --admin-username myuser --image UbuntuLTS --public-ip-sku Standard --generate-ssh-keys --verbose

Let’s talk about infrastructure. Basically, anything that relates to how we’re setting up and configuring (policies, users, VPCs, storage buckets, etc.) what we want for our technology stack is what it’s called infrastructure. And code written in Terraform is focused on infrastructure. Instead of creating virtual machines, networks and subnets, manually, the developers use Terraform to automatically manage and provision their infrastructure for their application, thus Terraform is frequently used for Infrastructure as a Code (IaaC) on multiple cloud providers (GCP, Azure, AWS, Digital Ocean, etc.) these days.

cat is a Unix command that will simply output the contents of a file or multiple files.

In order to make a particular Azure subscription as a default subscription, type:

az account set --subscription "yourAzuresubscriptionID"