Serial console to login

how can i login to ubuntu shell throught serial console on nano develop kit?

I connect to uart1(/dev/ttyS0), i can see the boot log, but i can’t login after show

·Ubuntu 18.04.3 LTS jetson-4-3 ttyS0

jetson-4-3 login: 

Just seeing the login prompt says it is probably set up correctly (it is possible to have Jetson TX to your PC’s RX and get a prompt without being able to send, but it is unlikely to have only half of the wires). If you hit the enter button, does the prompt respond in such a way that you are certain the console at least sees the keystroke? Have you somehow completed the first boot account setup?