# How to change the Linux OS passwords on the NovaSeq X Series Instruments

The Oracle 8 Linux Operating System (OS) on the NovaSeq X Series has two accounts:

* `ilmnadmin` (Administrator)
* `ilmnuser` (Standard User)

The administrator account is intended only for applying system updates and updating passwords. Perform all other functions, including sequencing, from the `ilmnuser` account.

**To reset the `ilmnuser` password from the `ilmnadmin` account:**

1. Log into `ilmnadmin`.
2. Select the **Activities** menu in the top left corner, then open the **Terminal**.
3. Enter the command: `sudo passwd ilmnuser`
4. Enter the `ilmnadmin` password at the prompt.
5. Enter a new `ilmnuser` password at the prompt.
6. Retype the new `ilmnuser` password at the prompt to confirm the new password.

If all passwords have been lost/misplaced, contact [Illumina Technical Support](https://www.illumina.com/company/contact-us.html#/united-states/technical-support) for further guidance.

\
\
\ <br>

|                                                                                                                                                                                                                                                                                                                                                                        |
| :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: |
| *For any feedback or questions regarding this article (Illumina Knowledge Article #7976), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000007976%20-%20Instrumentation%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://knowledge.illumina.com/instrumentation/novaseq-x-x-plus/instrumentation-novaseq-x-x-plus-reference_material-list/000007976.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.