UNIX_CHKPWD(8)            (06/08/2020)             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.

     Page 1                  Linux-PAM Manual        (printed 5/25/22)