redhat man page for kdestroy

KDESTROY(1)						      General Commands Manual						       KDESTROY(1)

NAME
       kdestroy - destroy Kerberos tickets

SYNOPSIS
       kdestroy [-5] [-4] [-q] [-c cache_name]

DESCRIPTION
       The  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.  If kdestroy was built with Kerberos
       4  support,  the default behavior is to destroy both Kerberos 5 and Kerberos 4 credentials.  Otherwise, kdestroy will default to destroying
       only Kerberos 5 credentials.

OPTIONS
       -5     destroy Kerberos 5 credentials.  This overrides whatever the default built-in behavior may be.  This option may be used with -4

       -4     destroy Kerberos 4 credentials.  This overrides whatever the default built-in behavior may be.  This option  is  only  available	if
	      kinit was built with Kerberos 4 compatibility.  This option may be used with -5

       -q     Run quietly.  Normally kdestroy beeps if it fails to destroy the user's tickets.	The -q flag suppresses this behavior.

       -c cache_name
	      use  cache_name as the credentials (ticket) cache name and location; if this option is not used, the default cache name and location
	      are used.

	      The default credentials cache may vary between systems.  If the KRB5CCNAME environment variable is set, its value is  used  to  name
	      the default ticket cache.

       Most  installations  recommend  that  you place the kdestroy command in your .logout file, so that your tickets are destroyed automatically
       when you log out.

ENVIRONMENT
       Kdestroy uses the following environment variables:

       KRB5CCNAME      Location of the Kerberos 5 credentials (ticket) cache.

       KRBTKFILE      Filename of the Kerberos 4 credentials (ticket) cache.

FILES
       /tmp/krb5cc_[uid]  default location of Kerberos 5 credentials cache ([uid] is the decimal UID of the user).

       /tmp/tkt[uid]  default location of Kerberos 4 credentials cache ([uid] is the decimal UID of the user).

SEE ALSO
       kinit(1), klist(1), krb5(3)

BUGS
       Only the tickets in the specified credentials cache are destroyed.  Separate ticket caches are used to  hold  root  instance  and  password
       changing tickets.  These should probably be destroyed too, or all of a user's tickets kept in a single credentials cache.

																       KDESTROY(1)