centos man page for unix_update

UNIX_UPDATE(8)							 Linux-PAM Manual						    UNIX_UPDATE(8)

NAME
       unix_update - Helper binary that updates the password of a given user

SYNOPSIS
       unix_update [...]

DESCRIPTION
       unix_update is a helper program for the pam_unix module that updates the password of a given user. It is not intended to be run directly
       from the command line and logs a security violation if done so.

       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_unix module and it should not be
       called directly from applications.

SEE ALSO
       pam_unix(8)

AUTHOR
       Written by Tomas Mraz and other various people.

Linux-PAM Manual						    09/19/2013							    UNIX_UPDATE(8)