# phpman > man > pam_shells(8)

[PAM_SHELLS(8)](https://www.chedong.com/phpMan.php/man/PAMSHELLS/8/markdown)                             Linux-PAM Manual                             [PAM_SHELLS(8)](https://www.chedong.com/phpMan.php/man/PAMSHELLS/8/markdown)



## NAME
       pam_shells - PAM module to check for valid login shell

## SYNOPSIS
       **pam**___**shells.so**

## DESCRIPTION
       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.

## OPTIONS
       This module does not recognise any options.

## MODULE TYPES PROVIDED
       The **auth** and **account** module types are provided.

## RETURN VALUES
       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.

## EXAMPLES
           auth  required  pam_shells.so



## SEE ALSO
       [**shells**(5)](https://www.chedong.com/phpMan.php/man/shells/5/markdown), [**pam.conf**(5)](https://www.chedong.com/phpMan.php/man/pam.conf/5/markdown), [**pam.d**(5)](https://www.chedong.com/phpMan.php/man/pam.d/5/markdown), [**pam**(7)](https://www.chedong.com/phpMan.php/man/pam/7/markdown)

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



Linux-PAM Manual                             06/08/2020                                [PAM_SHELLS(8)](https://www.chedong.com/phpMan.php/man/PAMSHELLS/8/markdown)