# UNIX_CHKPWD - Helper binary that verifies the password of the curren... - man(8) - [phpMan]

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

## NAME
       unix_chkpwd - Helper binary that verifies the password of the current user

## SYNOPSIS


       **unix_chkpwd **[...]

## DESCRIPTION
       _unix_chkpwd_ is a helper program for the _pam_unix_ module that verifies the password of the
       current user. It also checks password and account expiration dates in _shadow_. It is not
       intended to be run directly from the command line and logs a security violation if done so.

       It is typically installed setuid root or setgid shadow.

       The interface of the helper - command line options, and input/output data format are internal
       to the _pam_unix_ module and it should not be called directly from applications.

## SEE ALSO
       [**pam_unix**(8)](https://www.chedong.com/phpMan.php/man/pamunix/8/markdown)

## AUTHOR
       Written by Andrew Morgan and other various people.

Linux-PAM                                    05/07/2023                               [_UNIX_CHKPWD_(8)](https://www.chedong.com/phpMan.php/man/UNIXCHKPWD/8/markdown)