How to run sudo commands in terraform?

The answer was to use the following syntax in my first sudo command:

"echo yourPW | sudo -S someCommand" 

This bypasses the sudo password prompt and enters the password directly into the command. I already had my sudo password as a variable "${var.pw}" so running my sudo commands was the simple matter of changing my first command to:

  provisioner "remote-exec" {
    inline = [
      "echo ${var.pw} | sudo -S apt-get update",
      "sudo apt-get install -y curl"
    ]
  }

What about:

echo ${var.pw} | sudo -S -k apt-get update

-k means to ignore cached credentials to force sudo to always ask. This is for consistent behavior.

https://superuser.com/q/67765