DOKK / manpages / debian 11 / libpam-modules / pam_shells.8.en
PAM_SHELLS(8) Linux-PAM Manual PAM_SHELLS(8)

pam_shells - PAM module to check for valid login shell

pam_shells.so

pam_shells is a PAM module that only allows access to the system if the user's shell is listed in /etc/shells.

It also checks if /etc/shells is a plain file and not world writable.

This module does not recognise any options.

The auth and account module types are provided.

PAM_AUTH_ERR

Access to the system was denied.

PAM_SUCCESS

The user's login shell was listed as valid shell in /etc/shells.

PAM_SERVICE_ERR

The module was not able to get the name of the user.

auth  required  pam_shells.so

shells(5), pam.conf(5), pam.d(5), pam(7)

pam_shells was written by Erik Troan <ewt@redhat.com>.

06/08/2020 Linux-PAM Manual