# User Accounts and Password Management on the NovaSeq X/X Plus Instrument

The **NovaSeq X/X Plus Linux Operating System** has three accounts:

* Root (super administrator)
* ilmnadmin (administrator)
* ilmnuser (user)

The ilmnadmin (administrator account) is intended only for applying system updates, like updating the NovaSeq X/X Plus Control Software, or for use by IT staff to mount a persistent network drive. Perform all other functions, including sequencing, from the ilmnuser account.

The Field Service Engineer (FSE) initiates a password change for all three accounts after completing instrument installation.

The **NovaSeq X/X Plus Series Control Software** has the following user groups:

* Sequencer Operators: Allows users to perform sequencing and access all sequencing features. To access the control software on-instrument, the user must be part of the sequencing operator group. Users are automatically added to the sequencer operator group.
* Administrator: Allows users to access all administrator functions in settings. Assign the administrator group when adding a user.

The Control Software Password settings use the following defaults.

* Password expiration: 90 days.
* Invalid sign-in attempts: Five attempts.
* Automatic sign-out time: 30 minutes.

If locked out of a user account, search for Knowledge Base article: **How to change passwords for the Control Software user accounts on the NovaSeq X/X Plus**.

To create a new user account, search for Knowledge Base article: **How to create new user accounts for the Control Software on the NovaSeq X/X Plus**.

For additional information, see the system configuration section of the [NovaSeq X/X Plus Product Documentation](https://support.illumina.com/sequencing/sequencing_instruments/novaseq-x-novaseq-x-plus/documentation.html).

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| *For any feedback or questions regarding this article (Illumina Knowledge Article #7772), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000007772%20-%20Instrumentation%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |


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