Helper binary that verifies the password of the current user
add an example, a script, a trick and tips
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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.
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.
Andrew Morgan and other various people.