Merge pull request #18485 from dvdksn/engine-rhel-s390x

engine: clarify the s390x limitation for rhel

content/engine/install/_index.md

@@ -63,12 +63,12 @@ Docker provides `.deb` and `.rpm` packages from the following Linux distros
 and architectures:
 
 | Platform                                       | x86_64 / amd64    | arm64 / aarch64   | arm (32-bit)             | ppc64le         | s390x           |
-| :--------------------------------------------- | :------------------ | :------------------ | :------------------------- | :---------------- | :---------------- |
+| :--------------------------------------------- | :---------------- | :---------------- | :----------------------- | :-------------- | :-------------- |
 | [CentOS](centos.md)                            | [✅](centos.md)   | [✅](centos.md)   |                          | [✅](centos.md) |                 |
 | [Debian](debian.md)                            | [✅](debian.md)   | [✅](debian.md)   | [✅](debian.md)          | [✅](debian.md) |                 |
 | [Fedora](fedora.md)                            | [✅](fedora.md)   | [✅](fedora.md)   |                          | [✅](fedora.md) |                 |
 | [Raspberry Pi OS (32-bit)](raspberry-pi-os.md) |                   |                   | [✅](raspberry-pi-os.md) |                 |                 |
-| [RHEL](rhel.md)                                |                     |                     |                            |                   | [✅](rhel.md)     |
+| [RHEL (s390x)](rhel.md)                        |                   |                   |                          |                 | [✅](rhel.md)   |
 | [SLES](sles.md)                                |                   |                   |                          |                 | [✅](sles.md)   |
 | [Ubuntu](ubuntu.md)                            | [✅](ubuntu.md)   | [✅](ubuntu.md)   | [✅](ubuntu.md)          | [✅](ubuntu.md) | [✅](ubuntu.md) |
 | [Binaries](binaries.md)                        | [✅](binaries.md) | [✅](binaries.md) | [✅](binaries.md)        |                 |                 |

content/engine/install/rhel.md

@@ -3,7 +3,7 @@ description: Learn how to install Docker Engine on RHEL. These instructions cove
   the different installation methods, how to uninstall, and next steps.
 keywords: requirements, apt, installation, rhel, rpm, install, install docker engine, uninstall, upgrade,
   update, s390x, ibm-z
-title: Install Docker Engine on RHEL
+title: Install Docker Engine on RHEL (s390x)
 toc_max: 4
 aliases:
 - /ee/docker-ee/rhel/
@@ -17,18 +17,22 @@ aliases:
 download-url-base: https://download.docker.com/linux/rhel
 ---
 
+> **Note**
+>
+> The installation instructions on this page refer to packages for RHEL on the
+> **s390x** architecture (IBM Z). Other architectures, including x86_64, aren't
+> yet supported for RHEL.
+>
+> For other architectures, you may be able to install the CentOS packages.
+> Refer to [Install Docker Engine on CentOS](centos.md).
+{ .warning }
+
 To get started with Docker Engine on RHEL, make sure you
 [meet the prerequisites](#prerequisites), and then follow the
 [installation steps](#installation-methods).
 
 ## Prerequisites
 
-> **Note**
->
-> We currently only provide packages for RHEL on s390x (IBM Z). Other architectures
-> are not yet supported for RHEL, but you may be able to install the CentOS packages
-> on RHEL. Refer to the [Install Docker Engine on CentOS](centos.md) page for details.
-
 ### OS requirements
 
 To install Docker Engine, you need a maintained version of one of the following

data/toc.yaml

@@ -1406,7 +1406,7 @@ Manuals:
     - path: /engine/install/fedora/
       title: Fedora
     - path: /engine/install/rhel/
-      title: RHEL
+      title: RHEL (s390x)
     - path: /engine/install/sles/
       title: SLES
     - path: /engine/install/ubuntu/