Creates standalone pages for OpenSearch Dashboards RPM/YUM Installation (#1113)

* More changes and removing references to OS core as this page is for dashboards only

Signed-off-by: JeffH-AWS <jeffhuss@amazon.com>

* Finalized steps for rpm install

Signed-off-by: JeffH-AWS <jeffhuss@amazon.com>

* Typo

Signed-off-by: JeffH-AWS <jeffhuss@amazon.com>

* Phrasing

Signed-off-by: JeffH-AWS <jeffhuss@amazon.com>

* Finishing up

Signed-off-by: JeffH-AWS <jeffhuss@amazon.com>

* Final changes.

Signed-off-by: JeffH-AWS <jeffhuss@amazon.com>

Signed-off-by: JeffH-AWS <jeffhuss@amazon.com>

_dashboards/install/rpm.md

@@ -0,0 +1,90 @@
+---
+layout: default
+title: RPM
+parent: Install OpenSearch Dashboards
+nav_order: 31
+---
+
+{% comment %}
+The following liquid syntax declares a variable, major_version_mask, which is transformed into "N.x" where "N" is the major version number. This is required for proper versioning references to the Yum repo.
+{% endcomment %}
+{% assign version_parts = site.opensearch_major_minor_version | split: "." %}
+{% assign major_version_mask = version_parts[0] | append: ".x" %}
+
+# Run OpenSearch Dashboards using RPM Package Manager (RPM)
+
+OpenSearch Dashboards is the default visualization tool for data in OpenSearch. It also serves as a user interface for many of the OpenSearch plugins, including security, alerting, Index State Management, SQL, and more.
+
+## Install OpenSearch Dashboards from a package
+
+1. Download the RPM package for the desired version directly from the [OpenSearch downloads page](https://opensearch.org/downloads.html){:target='\_blank'}. The RPM package can be download for both **x64** and **arm64** architectures.
+1. Import the public GPG key. This key verifies that your OpenSearch instance is signed.
+    ```bash
+    sudo rpm --import https://artifacts.opensearch.org/publickeys/opensearch.pgp
+    ```
+1. From the command line interface (CLI), you can install the package with `rpm` or `yum`.
+    **x64**
+    ```bash
+    # Install the x64 package using yum.
+    sudo yum install opensearch-dashboards-{{site.opensearch_version}}-linux-x64.rpm
+    # Install the x64 package using rpm.
+    sudo rpm -ivh opensearch-dashboards-{{site.opensearch_version}}-linux-x64.rpm
+    ```
+    **arm64**
+    ```bash
+    # Install the arm64 package using yum.
+    sudo yum install opensearch-dashboards-{{site.opensearch_version}}-linux-arm64.rpm
+    # Install the arm64 package using rpm.
+    sudo rpm -ivh opensearch-dashboards-{{site.opensearch_version}}-linux-arm64.rpm
+    ```
+1. After the installation succeeds, enable OpenSearch Dashboards as a service.
+    ```bash
+    sudo systemctl enable opensearch-dashboards
+    ```
+1. Start OpenSearch Dashboards.
+    ```bash
+    sudo systemctl start opensearch-dashboards
+    ```
+1. Verify that OpenSearch Dashboards launched correctly.
+    ```bash
+    sudo systemctl status opensearch-dashboards
+    ```
+
+## Install OpenSearch Dashboards from a local YUM repository
+
+YUM, the primary package management tool for Red Hat-based operating systems, allows you to download and install the RPM package from the YUM repository library. 
+
+1. Create a local repository file for OpenSearch Dashboards:
+   ```bash
+   sudo curl -SL https://artifacts.opensearch.org/releases/bundle/opensearch-dashboards/{{major_version_mask}}/opensearch-dashboards-{{major_version_mask}}.repo -o /etc/yum.repos.d/opensearch-dashboards-{{major_version_mask}}.repo
+   ```
+1. Verify that the repository was created successfully.
+    ```bash
+    sudo yum repolist
+    ```
+1. Clean your YUM cache, to ensure a smooth installation:
+   ```bash
+   sudo yum clean all
+   ```
+1. With the repository file downloaded, list all available versions of OpenSearch-Dashboards:
+   ```bash
+   sudo yum list opensearch-dashboards --showduplicates
+   ```
+1. Choose the version of OpenSearch Dashboards you want to install: 
+   - Unless otherwise indicated, the highest minor version of OpenSearch installs.
+   ```bash
+   sudo yum install opensearch-dashboards
+   ```
+   - To install a specific version of OpenSearch Dashboards:
+   ```bash
+   sudo yum install 'opensearch-dashboards-{{site.opensearch_version}}'
+   ```
+1. During installation, the installer will present you with the GPG key fingerprint. Verify that the information matches the following:
+   ```bash
+   Fingerprint: c5b7 4989 65ef d1c2 924b a9d5 39d3 1987 9310 d3fc
+   ```
+    - If correct, enter `yes` or `y`. The OpenSearch installation continues.
+1. Once complete, you can run OpenSearch Dashboards.
+    ```bash
+    sudo systemctl start opensearch-dashboards
+    ```