Unknown user offered by lightdm greeter.(SOLVED)

[GuiGuy]

Are you using OpenStack services or a personal cloud? Those can depend on nova-compute which creates the nova user.

No OpenStack
No personal cloud.

[GuiGuy]

The id number is interesting.. Whatever, you can try

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sudo deluser nova

Also have a check:

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sudo visudo

If there are any remaining lines , something like:

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nova    ALL=(ALL:ALL) ALL

delete , save, close.


Edit: Probably it's due to something like Tim mentioned above (hence that interesting id number).

sudo deluser nova
worked!

Thanks, Huck.

[Huckleberry Finn]

Thank you, too for marking the thread :)