Update serial-console-linux.md

Author: genlin

support/azure/virtual-machines/linux/serial-console-linux.md

@@ -33,25 +33,18 @@ For Serial Console documentation for Windows, see [Serial Console for Windows](.
 > [!NOTE]
 > Serial Console is compatible with a managed boot diagnostics storage account.
 
-## Prerequisites
+## Prerequisites to access the Azure Serial Console
 
-- Your VM or virtual machine scale set instance must use the resource management deployment model. Classic deployments aren't supported.
+To access the Serial Console on your VM or virtual machine scale set instance, you will need the following:
 
-- Your account that uses serial console must have the [Virtual Machine Contributor role](/azure/role-based-access-control/built-in-roles#virtual-machine-contributor) for the VM and the [boot diagnostics](../windows/boot-diagnostics.md) storage account
+- Boot diagnostics must be enabled for the VM
+- A user account that uses password authentication must exist within the VM. You can create a password-based user with the [reset password](/azure/virtual-machines/extensions/vmaccess#reset-password) function of the VM access extension. Select **Reset password** from the **Help** section.
+- The Azure account accessing Serial Console must have [Virtual Machine Contributor role](/azure/role-based-access-control/built-in-roles#virtual-machine-contributor) for both the VM and the [boot diagnostics](boot-diagnostics.md) storage account
+- Classic deployments aren't supported. Your VM or virtual machine scale set instance must use the Azure Resource Manager deployment model.
+- Serial Console is not supported when the storage account has **Allow storage account key access** disabled.
 
-- Your VM or virtual machine scale set instance must have a password-based user. You can create one with the [reset password](/azure/virtual-machines/extensions/vmaccess#reset-password) function of the VM access extension. Select **Reset password** from the **Help** section.
-
-- Your VM or virtual machine scale set instance must have [boot diagnostics](../windows/boot-diagnostics.md) enabled.
-
-    :::image type="content" source="media/serial-console-linux/diagnostics-settings.png" alt-text="Screenshot of the Diagnostics settings page in Azure portal. The Boot diagnostics option is enabled.":::
-
-- For settings specific to Linux distributions, see [Serial console Linux distribution availability](#serial-console-linux-distribution-availability).
-
-- Your VM or virtual machine scale set instance must be configured for serial output on `ttys0`. This is the default for Azure images, but you will want to double check this on custom images. Details [below](#custom-linux-images).
-
-> [!NOTE]
-> The serial console requires a local user with a configured password. VMs or virtual machine scale sets configured only with an SSH public key won't be able to sign in to the serial console. To create a local user with a password, use the [VMAccess Extension](/azure/virtual-machines/extensions/vmaccess), which is available in the portal by selecting **Reset password** in the Azure portal, and create a local user with a password.
-> You can also reset the administrator password in your account by [using GRUB to boot into single user mode](./serial-console-grub-single-user-mode.md).
+> [!IMPORTANT]
+> Serial Console is now compatible with [managed boot diagnostics storage accounts](boot-diagnostics.md) and custom storage account firewalls
 
 ## Serial Console Linux distribution availability