# 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.

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