unix_chkpwd(8) — Linux manual page

UNIX_CHKPWD(8)              Linux-PAM Manual              UNIX_CHKPWD(8)

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)

AUTHOR

       Written by Andrew Morgan and other various people.

COLOPHON

       This page is part of the linux-pam (Pluggable Authentication
       Modules for Linux) project.  Information about the project can be
       found at ⟨http://www.linux-pam.org/⟩.  If you have a bug report
       for this manual page, see ⟨//www.linux-pam.org/⟩.  This page was
       obtained from the project's upstream Git repository
       ⟨https://github.com/linux-pam/linux-pam.git⟩ on 2023-12-22.  (At
       that time, the date of the most recent commit that was found in
       the repository was 2023-12-18.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

Linux-PAM Manual               12/22/2023                 UNIX_CHKPWD(8)

Pages that refer to this page: pam_unix(8)

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