## KDESTROY Command

(from UNIX man page)

    User Commands  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.