> For the complete documentation index, see [llms.txt](https://knowledge.illumina.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://knowledge.illumina.com/instrumentation/nextseq-1000-2000/instrumentation-nextseq-1000-2000-troubleshooting-list/000003297.md).

# How to Reset Linux Operating System (OS) User Passwords on the NextSeq 1000/2000

**Background**

The Linux Operating System (OS) on the NextSeq 1000/2000 has three accounts:

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

The `ilmnadmin` Administrator account is intended only for applying system updates, like updating the NextSeq 1000/2000 Control Software, or for use by IT staff to mount a persistent network drive. Perform all other functions, including sequencing, from the `ilmnuser` user account.

The login credentials are specific to each account. If there are too many failed login attempts with the incorrect password, the account locks. The timeout for a locked user account is 10 minutes.

If the password for `ilmnuser` is manually changed by the `ilmnadmin` Administrator account, the lock-out timer is **NOT** be removed.

**Resolution Actions**

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

1. Log into the Linux OS as `ilmnadmin`.
2. Select the **Activities** menu in the top-left corner, then input terminal to open the Terminal application.
3. Enter sudo passwd ilmnuser and press **Enter**.
4. Enter the `ilmnadmin` password when prompted.
5. Enter a new `ilmnuser` password at the prompt, then press **Enter**.
6. Retype the new `ilmnuser` password at the prompt, then press Enter to confirm the new password.

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

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| *For any feedback or questions regarding this article (Illumina Knowledge Article #3297), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000003297%20-%20Instrumentation%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |


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