Add clarifications around Arm packages and Ubuntu (#38922)

* Clarify Arm

* Clarify Arm

Author: adegeo

docs/core/install/includes/linux-install-package-manager-x64-vs-arm-ubuntu.md

@@ -0,0 +1,14 @@
+---
+author: adegeo
+ms.author: adegeo
+ms.date: 12/29/2023
+ms.topic: include
+---
+
+> [!IMPORTANT]
+> Using a package manager to install .NET from the **Microsoft pacakge feed** only supports the **x64** architecture. Other architectures, such as **Arm**, aren't supported by the **Microsoft package feed**. Use the Ubuntu feed or manually install .NET. Be cautious of package mix up problems. For more information, see [.NET package mix ups on Linux](../linux-package-mixup.md?pivots=os-linux-ubuntu#whats-going-on).
+
+For more information on installing .NET **without a package manager**, see one of the following articles:
+
+- [Use the `install-dotnet` script to install .NET.](../linux-scripted-manual.md#scripted-install)
+- [Manually install .NET.](../linux-scripted-manual.md#manual-install)

docs/core/install/includes/linux-install-package-manager-x64-vs-arm.md

@@ -1,12 +1,12 @@
 ---
 author: adegeo
 ms.author: adegeo
-ms.date: 11/14/2023
+ms.date: 12/29/2023
 ms.topic: include
 ---
 
 > [!IMPORTANT]
-> Package manager installs are only supported on the **x64** architecture. Other architectures, such as **Arm**, must install .NET by some other means such as with an installer script or with manual binary installation.
+> Using a package manager to install .NET from the **Microsoft pacakge feed** only supports the **x64** architecture. Other architectures, such as **Arm**, aren't supported by the **Microsoft package feed**.
 
 For more information on installing .NET **without a package manager**, see one of the following articles:
 

docs/core/install/linux-ubuntu-2304.md

@@ -12,7 +12,7 @@ This article discusses how to install .NET on Ubuntu 23.04; .NET 8, .NET 7, and
 
 [!INCLUDE [linux-intro-sdk-vs-runtime](includes/linux-intro-sdk-vs-runtime.md)]
 
-[!INCLUDE [linux-install-package-manager-x64-vs-arm](includes/linux-install-package-manager-x64-vs-arm.md)]
+[!INCLUDE [linux-install-package-manager-x64-vs-arm-ubuntu](includes/linux-install-package-manager-x64-vs-arm-ubuntu.md)]
 
 .NET is available in the Ubuntu package manager feeds, as well as the Microsoft package repository. However, you should only use one or the other to install .NET. If you want to use the Microsoft package repository, see [How to register the Microsoft package repository](linux-ubuntu.md#register-the-microsoft-package-repository).
 

docs/core/install/linux-ubuntu-2310.md

@@ -12,7 +12,7 @@ This article discusses how to install .NET on Ubuntu 23.10; .NET 8, .NET 7, and
 
 [!INCLUDE [linux-intro-sdk-vs-runtime](includes/linux-intro-sdk-vs-runtime.md)]
 
-[!INCLUDE [linux-install-package-manager-x64-vs-arm](includes/linux-install-package-manager-x64-vs-arm.md)]
+[!INCLUDE [linux-install-package-manager-x64-vs-arm-ubuntu](includes/linux-install-package-manager-x64-vs-arm-ubuntu.md)]
 
 .NET is available in the Ubuntu package manager feeds, as well as the Microsoft package repository. However, you should only use one or the other to install .NET. If you want to use the Microsoft package repository, see [How to register the Microsoft package repository](linux-ubuntu.md#register-the-microsoft-package-repository).