Autenthication error after having created new user

[viking60]

If you delete a user and create a new one in Linux it can happen that you get this message when the new user is logged in:

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passwd: User not known to the underlying authentication module

It happened to me in Arch.

So it seems like some old data were left on the box. The new user was auto logged in, but I always got that annoying warning. That is an indication that something is wrong (even if everything works).

So to fix it, I simply re-installed pam (rather than looking for corrupted files in /etc/pam.d/).

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sudo pacman -S pam

PAM stands for Pluggable Authentication Modules and provides dynamic authentication support for applications and services in a Linux system.

That took care of it