Manual: pwhistory_helper

PWHISTORY_HELPER(8)				      Linux-PAM Manual					 PWHISTORY_HELPER(8)

NAME
       pwhistory_helper - Helper binary that transfers password hashes from passwd or shadow to opasswd

SYNOPSIS

       pwhistory_helper [...]

DESCRIPTION
       pwhistory_helper is a helper program for the pam_pwhistory module that transfers password hashes from passwd or
       shadow file to the opasswd file and checks a password supplied by user against the existing hashes in the opasswd
       file.

       The purpose of the helper is to enable tighter confinement of login and password changing services. The helper is
       thus called only when SELinux is enabled on the system.

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

SEE ALSO
       pam_pwhistory(8)

AUTHOR
       Written by Tomas Mraz based on the code originally in pam_pwhistory and pam_unix modules.

Linux-PAM						 07/16/2026					 PWHISTORY_HELPER(8)