在使用Terraform创建Azure Linux虚拟机时，可以使用Terraform的变量来动态地定义资源的属性。以下是一个示例解决方案，其中包含了Terraform变量和Azure Linux虚拟机的Terraform代码示例。

1. 创建一个variables.tf文件，定义需要使用的变量：

variable "resource_group_name" {
  description = "Name of the resource group"
  type        = string
}

variable "location" {
  description = "Azure region where the resources will be created"
  type        = string
  default     = "eastus"
}

variable "vm_name" {
  description = "Name of the virtual machine"
  type        = string
}

2. 创建一个main.tf文件，定义Azure Linux虚拟机的资源：

provider "azurerm" {
  features {}
}

resource "azurerm_resource_group" "example" {
  name     = var.resource_group_name
  location = var.location
}

resource "azurerm_linux_virtual_machine" "example" {
  name                = var.vm_name
  location            = azurerm_resource_group.example.location
  resource_group_name = azurerm_resource_group.example.name
  size                = "Standard_DS2_v2"

  admin_username = "adminuser"

  admin_ssh_key {
    username   = "adminuser"
    public_key = file("~/.ssh/id_rsa.pub")
  }

  os_disk {
    name              = "osdisk"
    caching           = "ReadWrite"
    storage_account_type = "Premium_LRS"
    disk_size_gb      = 30
  }

  source_image_reference {
    publisher = "Canonical"
    offer     = "UbuntuServer"
    sku       = "18.04-LTS"
    version   = "latest"
  }

  network_interface {
    name                      = "nic"
    primary                   = true
    network_security_group_id = azurerm_network_security_group.example.id
    ip_configuration {
      name      = "config"
      subnet_id = azurerm_subnet.example.id
    }
  }
}

resource "azurerm_network_security_group" "example" {
  name                = "nsg"
  location            = azurerm_resource_group.example.location
  resource_group_name = azurerm_resource_group.example.name

  security_rule {
    name                       = "SSH"
    priority                   = 1001
    direction                  = "Inbound"
    access                     = "Allow"
    protocol                   = "Tcp"
    source_port_range          = "*"
    destination_port_range     = "22"
    source_address_prefix      = "*"
    destination_address_prefix = "*"
  }
}

resource "azurerm_subnet" "example" {
  name                 = "subnet"
  resource_group_name  = azurerm_resource_group.example.name
  virtual_network_name = azurerm_virtual_network.example.name
  address_prefixes       = ["10.0.1.0/24"]
}

resource "azurerm_virtual_network" "example" {
  name                = "vnet"
  location            = azurerm_resource_group.example.location
  resource_group_name = azurerm_resource_group.example.name
  address_space       = ["10.0.0.0/16"]
}

3. 创建一个terraform.tfvars文件，定义变量的值：

resource_group_name = "my-resource-group"
vm_name             = "my-vm"

4. 运行以下命令来初始化Terraform并创建Azure Linux虚拟机：

terraform init
terraform plan
terraform apply

上述示例代码演示了如何使用Terraform变量在Azure中创建Linux虚拟机。可以根据需要自定义变量的值，并使用Terraform命令来创建虚拟机。