Explanation
https://www.terraform.io/docs/commands/environment-variables.html

Explanation
The remote-exec provisioner invokes a script on a remote resource after it is created. The remote-exec
provisioner supports both ssh and winrm type connections.
remote-exec connection types -
* ssh on Linux
* winrm on Windows
https://www.terraform.io/docs/provisioners/remote-exec.html

Explanation
The terraform plan command creates an execution plan, which lets you preview the changes that Terraform
plans to make to your infrastructure. The plan command alone will not actually carry out the proposed
changes, and so you can use this command to check whether the proposed changes match what you expected
before you apply the changes or share your changes with your team for broader review. Source:
https://www.terraform.io/cli/commands/plan

Explanation
https://www.terraform.io/cloud-docs/overview
Terraform Cloud is a commercial SaaS product developed by HashiCorp. Many of its features are free for
small teams, including remote state storage, remote runs, and VCS connections. We also offer paid plans for
larger teams that include additional collaboration and governance features. Each higher paid upgrade plan is a
strict superset of any lower plans - for example, the Team & Governance plan includes all of the features of
the Team plan.

Explanation
https://www.terraform.io/docs/commands/init.html