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As the image is there is no root password, it is too easy to mess up the system when using root. As I stated in my first post you need to use sudo. It would be best for you to search to how to use the sudo command for tasks that require elevated privileges.
Teaching one how to use Linux is not something that I am willing to do on the forum and quite frankly there are many quality tutorials on the net.
This one www.debian.org/doc/user-manuals#debian-handbook whilst it maybe for an earlier version of Debian it is a good start, and you should be able to find something in your native language.

what is the root id and password sir? i only know the default user credentials "cnc" with password "cnc"

no any errors.
it`s clean config for Lathe, generated by PNCCONFIG