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.

Linux-PAM			  06/19/2025			UNIX_CHKPWD(8)