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+.\" $Source$
+.\" $Author$
+.\" $Id$
+.\" Copyright 1992 by the Massachusetts Institute of Technology.
+.\"
+.\" Export of this software from the United States of America is assumed
+.\"   to require a specific license from the United States Government.
+.\"   It is the responsibility of any person or organization contemplating
+.\"   export to obtain such a license before exporting.
+.\" 
+.\" WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+.\" distribute this software and its documentation for any purpose and
+.\" without fee is hereby granted, provided that the above copyright
+.\" notice appear in all copies and that both that copyright notice and
+.\" this permission notice appear in supporting documentation, and that
+.\" the name of M.I.T. not be used in advertising or publicity pertaining
+.\" to distribution of the software without specific, written prior
+.\" permission.  M.I.T. makes no representations about the suitability of
+.\" this software for any purpose.  It is provided "as is" without express
+.\" or implied warranty.
+.\" 
+.\"
+.TH KDESTROY 1 "Kerberos Version 5.0" "MIT Project Athena"
+.SH NAME
+kdestroy \- destroy Kerberos tickets
+.SH SYNOPSIS
+.B kdestroy
+[
+.B \-c
+.I cachename
+]
+.SH DESCRIPTION
+The
+.I kdestroy
+utility destroys the user's active
+Kerberos authorization tickets by writing zeros to the specified
+credentials cache that contains them.  If the credentials cache is not
+specified, the default credentials cache is destroyed.
+.PP
+In the Athena workstation environment, the
+.I login 
+or 
+.I Xlogin
+program automatically destroys your tickets when you
+end a workstation session.
+If your site does not provide a similar ticket-destroying mechanism,
+you can place the
+.I kdestroy
+command in your
+.I .logout
+file so that your tickets are destroyed automatically
+when you logout.
+.PP
+.SH SEE ALSO
+kerberos(1), kinit(1), klist(1)
+.SH BUGS
+.PP
+Only the tickets in the user's current ticket file are destroyed.
+Separate ticket files are used to hold root instance and password
+changing tickets.  These files should probably be destroyed too, or
+all of a user's tickets kept in a single ticket file.