Serial console password CME9210 Linux

Hi,

My problem is that I do not need username and password to login Linux via serial console. How can I configure it? It seems to use busybox built-in shell (ash)

I have changed root password and all other passwords found from /etc/passwd…

Ok, I finally found it:
File:
/etc/inittab
Row:
::respawn:/bin/cttyhack /bin/login -f root

Removed “-r root”