passwd: Authentication token manipulation error about libnss-ato

[donapieppo]

From your configuration it seems that the real system user is ubuntu. The user jnchi is not a real system
user so has no line in /etc/shadow or /etc/passwd.

The use of libnss-ato, and i think of any libnns module, is to assign uid and gid to the username.

In order to change the user password I think you need to work on a pam module e not on a libnss module as libnss-ato.

[Jnchi]

So would the PAM module insert the password into /etc/shadow?

[donapieppo]

It depends on the pam module you use for authentication. From your message it seems you use Active Directory. The password so are in the AD server. Libnss-ato has no knowlege of where your service checks the passwords. Libnss-ato is just to give uid and gid to the users not present in /etc/passwod. For this reason libnss-ato has no role in changing the password.

[Jnchi]

From your message it seems you use Active Directory. The password so are in the AD server.

This module is for Azure Active Directory. Apparently, it is very different from regular Active Directory.

Anyway, thanks for the input! If I have more questions pertaining to uid or gid then I'll open another issue. Cheers!