Add missing OPENSEARCH_INITIAL_ADMIN_PASSWORD for both apt/deb and yum/rpm

_install-and-configure/install-opensearch/debian.md

@@ -38,20 +38,22 @@ This guide assumes that you are comfortable working from the Linux command line
 
 1. Download the Debian package for the desired version directly from the [OpenSearch downloads page](https://opensearch.org/downloads.html){:target='\_blank'}. The Debian package can be downloaded for both **x64** and **arm64** architectures.
 1. From the CLI, install using `dpkg`.
+
+   For new installations of OpenSearch 2.12 and later, you must define a custom admin password in order to set up a security demo configuration. Use one of the following commands to define a custom admin password:
    ```bash
    # x64
-   sudo dpkg -i opensearch-{{site.opensearch_version}}-linux-x64.deb
+   sudo env OPENSEARCH_INITIAL_ADMIN_PASSWORD=<custom-admin-password> dpkg -i opensearch-{{site.opensearch_version}}-linux-x64.deb
 
    # arm64
-   sudo dpkg -i opensearch-{{site.opensearch_version}}-linux-arm64.deb
+   sudo env OPENSEARCH_INITIAL_ADMIN_PASSWORD=<custom-admin-password> dpkg -i opensearch-{{site.opensearch_version}}-linux-arm64.deb
    ```
-   For OpenSearch 2.12 and greater, a custom admin password is required in order to set up a security demo configuration.  To set a custom admin password, use one the following commands:
+   For OpenSearch versions before 2.12:
    ```bash
    # x64
-   sudo env OPENSEARCH_INITIAL_ADMIN_PASSWORD=<custom-admin-password> dpkg -i opensearch-{{site.opensearch_version}}-linux-x64.deb
+   sudo dpkg -i opensearch-{{site.opensearch_version}}-linux-x64.deb
 
    # arm64
-   sudo env OPENSEARCH_INITIAL_ADMIN_PASSWORD=<custom-admin-password> dpkg -i opensearch-{{site.opensearch_version}}-linux-arm64.deb
+   sudo dpkg -i opensearch-{{site.opensearch_version}}-linux-arm64.deb
    ```
 
 1. After the installation succeeds, enable OpenSearch as a service.
@@ -136,14 +138,27 @@ APT, the primary package management tool for Debian–based operating systems, a
 
 1. Choose the version of OpenSearch you want to install: 
    - Unless otherwise indicated, the latest available version of OpenSearch is installed.
+
    ```bash
+   # For new installations of OpenSearch 2.12 and later, you must define a custom admin password in order to set up a security demo configuration.
+   # Use one of the following commands to define a custom admin password:
+   sudo env OPENSEARCH_INITIAL_ADMIN_PASSWORD=<custom-admin-password> apt-get install opensearch
+
+   # For OpenSearch versions before 2.12:
    sudo apt-get install opensearch
    ```
    {% include copy.html %}
 
    - To install a specific version of OpenSearch:
+
    ```bash
    # Specify the version manually using opensearch=<version>
+
+   # For new installations of OpenSearch 2.12 and later, you must define a custom admin password in order to set up a security demo configuration.
+   # Use one of the following commands to define a custom admin password:
+   sudo env OPENSEARCH_INITIAL_ADMIN_PASSWORD=<custom-admin-password> apt-get install opensearch={{site.opensearch_version}}
+
+   # For OpenSearch versions before 2.12:
    sudo apt-get install opensearch={{site.opensearch_version}}
    ```
 

_install-and-configure/install-opensearch/rpm.md

@@ -44,36 +44,37 @@ This guide assumes that you are comfortable working from the Linux command line
     ```
     {% include copy.html %}
 
-1. For OpenSearch 2.12 and greater, a custom admin password is required in order to set up a security demo configuration. To set a custom admin password, use one the following commands:
+1. From the CLI, you can install the package with `rpm` or `yum`.
 
    ```bash
-   # Install the x64 package using yum.
+   # For new installations of OpenSearch 2.12 and later, you must define a custom admin password in order to set up a security demo configuration.
+   # Use one of the following commands to define a custom admin password:
+
+   ## Install the x64 package using yum.
    sudo env OPENSEARCH_INITIAL_ADMIN_PASSWORD=<custom-admin-password> yum install opensearch-{{site.opensearch_version}}-linux-x64.rpm
 
-   # Install the x64 package using rpm.
+   ## Install the x64 package using rpm.
    sudo env OPENSEARCH_INITIAL_ADMIN_PASSWORD=<custom-admin-password> rpm -ivh opensearch-{{site.opensearch_version}}-linux-x64.rpm
 
-   # Install the arm64 package using yum.
-   sudo env OPENSEARCH_INITIAL_ADMIN_PASSWORD=<custom-admin-password> yum install opensearch-{{site.opensearch_version}}-linux-x64.rpm
+   ## Install the arm64 package using yum.
+   sudo env OPENSEARCH_INITIAL_ADMIN_PASSWORD=<custom-admin-password> yum install opensearch-{{site.opensearch_version}}-linux-arm64.rpm
 
-   # Install the arm64 package using rpm.
-   sudo env OPENSEARCH_INITIAL_ADMIN_PASSWORD=<custom-admin-password> rpm -ivh opensearch-{{site.opensearch_version}}-linux-x64.rpm
-   ```
+   ## Install the arm64 package using rpm.
+   sudo env OPENSEARCH_INITIAL_ADMIN_PASSWORD=<custom-admin-password> rpm -ivh opensearch-{{site.opensearch_version}}-linux-arm64.rpm
 
-1. From the CLI, you can install the package with `rpm` or `yum`.
+   # For OpenSearch versions before 2.12:
 
-   ```bash
-   # Install the x64 package using yum.
+   ## Install the x64 package using yum.
    sudo yum install opensearch-{{site.opensearch_version}}-linux-x64.rpm
 
-   # Install the x64 package using rpm.
+   ## Install the x64 package using rpm.
    sudo rpm -ivh opensearch-{{site.opensearch_version}}-linux-x64.rpm
 
-   # Install the arm64 package using yum.
-   sudo yum install opensearch-{{site.opensearch_version}}-linux-x64.rpm
+   ## Install the arm64 package using yum.
+   sudo yum install opensearch-{{site.opensearch_version}}-linux-arm64.rpm
 
-   # Install the arm64 package using rpm.
-   sudo rpm -ivh opensearch-{{site.opensearch_version}}-linux-x64.rpm
+   ## Install the arm64 package using rpm.
+   sudo rpm -ivh opensearch-{{site.opensearch_version}}-linux-arm64.rpm
    ```
 
 1. After the installation succeeds, enable OpenSearch as a service.
@@ -125,15 +126,27 @@ YUM, the primary package management tool for Red Hat–based operating systems,
    ```
    {% include copy.html %}
 
-1. Choose the version of OpenSearch you want to install: 
+1. Choose the version of OpenSearch you want to install:
    - Unless otherwise indicated, the latest available version of OpenSearch is installed.
+
    ```bash
+   # For OpenSearch 2.12 and greater, a custom admin password is required in order to set up a security demo configuration for new installation.
+   # To set a custom admin password, use the following commands:
+   sudo env OPENSEARCH_INITIAL_ADMIN_PASSWORD=<custom-admin-password> yum install opensearch
+
+   # For OpenSearch versions before 2.12:
    sudo yum install opensearch
    ```
    {% include copy.html %}
 
    - To install a specific version of OpenSearch:
+
    ```bash
+   # For new installations of OpenSearch 2.12 and later, you must define a custom admin password in order to set up a security demo configuration.
+   # Use one of the following commands to define a custom admin password:
+   sudo env OPENSEARCH_INITIAL_ADMIN_PASSWORD=<custom-admin-password> yum install 'opensearch-{{site.opensearch_version}}'
+
+   # For OpenSearch versions before 2.12:
    sudo yum install 'opensearch-{{site.opensearch_version}}'
    ```
    {% include copy.html %}