Make sure 2.19.6 is also mentioned in the security plugin params comments

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

@@ -26,6 +26,10 @@ This guide assumes that you are comfortable working from the Linux command line
    # arm64
    sudo dpkg -i opensearch-dashboards-{{site.opensearch_version}}-linux-arm64.deb
    ```
+   For new installations of OpenSearch Dashboards 2.19.6 and later, you can use the following environment variable to control the Security Dashboards plugin behavior:
+   ```bash
+   DISABLE_SECURITY_DASHBOARDS_PLUGIN=true
+   ```
 1. After the installation completes, reload the systemd manager configuration.
     ```bash
     sudo systemctl daemon-reload

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

@@ -40,6 +40,10 @@ OpenSearch Dashboards is the default visualization tool for data in OpenSearch.
     # Install the arm64 package using rpm.
     sudo rpm -ivh opensearch-dashboards-{{site.opensearch_version}}-linux-arm64.rpm
     ```
+    For new installations of OpenSearch Dashboards 2.19.6 and later, you can use the following environment variable to control Security Dashboards plugin behavior:
+    ```bash
+    DISABLE_SECURITY_DASHBOARDS_PLUGIN=true
+    ```
 1. After the installation succeeds, enable OpenSearch Dashboards as a service.
     ```bash
     sudo systemctl enable opensearch-dashboards

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

@@ -56,6 +56,14 @@ This guide assumes that you are comfortable working from the Linux command line
    # arm64
    sudo dpkg -i opensearch-{{site.opensearch_version}}-linux-arm64.deb
    ```
+   For new installations of OpenSearch 2.19.6 and later, you can use the following installation-time environment variables to control the Security plugin behavior:
+   * `DISABLE_INSTALL_DEMO_CONFIG=true` -- Prevents the installer from setting up demo security configuration (certificates, users, and roles). Use this for installations where you will configure security manually.
+   * `DISABLE_SECURITY_PLUGIN=true` -- Disables the Security plugin entirely. Only use this for testing or development environments where security is not required.
+
+   To use these environment variables, add them before the installation command with the `env` keyword:
+   ```bash
+   sudo env DISABLE_INSTALL_DEMO_CONFIG=true dpkg -i opensearch-{{site.opensearch_version}}-linux-x64.deb
+   ```
 
 1. After the installation succeeds, enable OpenSearch as a service.
     ```bash

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

@@ -77,6 +77,14 @@ This guide assumes that you are comfortable working from the Linux command line
    ## Install the arm64 package using rpm.
    sudo rpm -ivh opensearch-{{site.opensearch_version}}-linux-arm64.rpm
    ```
+   For new installations of OpenSearch 2.19.6 and later, you can use the following installation-time environment variables to control the Security plugin behavior:
+   * `DISABLE_INSTALL_DEMO_CONFIG=true` -- Prevents the installer from setting up demo security configuration (certificates, users, and roles). Use this for installations where you will configure security manually.
+   * `DISABLE_SECURITY_PLUGIN=true` -- Disables the Security plugin entirely. Only use this for testing or development environments where security is not required.
+
+   To use these environment variables, add them before the installation command with the `env` keyword:
+   ```bash
+   sudo env DISABLE_INSTALL_DEMO_CONFIG=true yum install opensearch-{{site.opensearch_version}}-linux-x64.rpm
+   ```
 
 1. After the installation succeeds, enable OpenSearch as a service.