Hello! If you want to configure autologin for ubuntu, then open terminal and write:
sudo systemctl edit getty@tty1.service
This will create a file (if needed) and open editor.
In the editor, write:
[Service]
ExecStart=
ExecStart=-/sbin/agetty --noissue --autologin khadas %I $TERM
Type=idle
Where khadas is your username (root, for example).
If you don’t know how to close editor? - Ctrl+X then Y and then press Enter.