> For the complete documentation index, see [llms.txt](https://docs.ovaledge.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ovaledge.com/release8.3/deployment-and-maintenance/upgrade/elasticsearch-9.x-upgrade-linux.md).

# Elasticsearch 9.x Upgrade (Linux)

This article outlines the steps to upgrade Elasticsearch to version 9 in a Linux environment. The process includes verifying the current installation, removing the existing version, and installing the updated version using automated scripts. Following these steps ensures a consistent and controlled upgrade process.

## Prerequisites

* Ensure the Java upgrade process on the Linux machine is completed.
* Confirm access to the server with the required permissions to execute shell scripts.
* Ensure network access to download scripts from the provided URLs.
* Verify that Elasticsearch credentials are available for post-installation validation.

## Steps Involved

### Verify Existing Elasticsearch Version

* Run the following command to check the currently installed Elasticsearch version:

  ```
  curl -XGET -u elastic:0valEdge! http://localhost:9200 
  ```
* Review the response to confirm the existing version.\
  \
  Sample Reference Screenshot:

  <figure><img src="https://content.gitbook.com/content/8fgltewNgYZ8ucAp7Svt/blobs/7BJFbD8b5ho4swcMZlOI/unknown.png" alt=""><figcaption></figcaption></figure>

### Uninstall Existing Elasticsearch

* Download and execute the uninstall script:

  ```
  wget https://ovaledge.s3.us-west-1.amazonaws.com/scripts/8x_automation/remove_elasticsearch.sh
  sh remove_elasticsearch.sh
  ```

  \
  Sample Reference Screenshot:

  <figure><img src="https://content.gitbook.com/content/8fgltewNgYZ8ucAp7Svt/blobs/NirVwfU4vjZmvzA8L3EZ/unknown.png" alt=""><figcaption></figcaption></figure>
* Ensure the script completes successfully before proceeding.

### Install Elasticsearch Version 9

* Download and execute the installation script:

  ```
  wget https://ovaledge.s3.us-west-1.amazonaws.com/scripts/8x_automation/install_es.sh
  sh install_es.sh
  ```

  \
  Sample Reference Screenshot:

  <figure><img src="https://content.gitbook.com/content/8fgltewNgYZ8ucAp7Svt/blobs/IgovpF9Dhd0iO9GXX1rT/unknown.png" alt=""><figcaption></figcaption></figure>
* Wait for the installation process to complete.

### Validate Elasticsearch Installation

* Run the following command to verify the upgraded version:

  ```
  curl -XGET -u elastic:0valEdge! http://localhost:9200
  ```
* Confirm that the response reflects Elasticsearch version 9.

***

Copyright © 2026, OvalEdge LLC, Peachtree Corners, GA, USA.


---

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