Ubuntu 20.04 (Gnome) create user without graphical interface

Question

I'm trying to create user who is hidden. I would don`t see this user on GUI welcome screen.

I need that user only to administrate some applications.

Answer 1

to have user without GUI we need "system user".

to do that we can execute: sudo adduser --system user_name

after that we need to set password: sudo passwd user_name