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.
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 tarball Linux-PAM-1.3.0.tar.bz2 fetched from
⟨http://www.linux-pam.org/library/⟩ on 2021-08-27. 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 email@example.com
Linux-PAM Manual 04/01/2016 UNIX_UPDATE(8)