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CentOS 7.0 - man page for kinit (centos section 1)

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KINIT(1)				   MIT Kerberos 				 KINIT(1)

       kinit - obtain and cache Kerberos ticket-granting ticket

       kinit [-V] [-l lifetime] [-s start_time] [-r renewable_life] [-p | -P] [-f | -F] [-a] [-A]
       [-C] [-E] [-v] [-R] [-k [-t keytab_file]]  [-c  cache_name]  [-n]  [-S  service_name]  [-I
       input_ccache] [-T armor_ccache] [-X attribute[=value]] [principal]

       kinit obtains and caches an initial ticket-granting ticket for principal.

       -V     display verbose output.

       -l lifetime
	      (duration string.)  Requests a ticket with the lifetime lifetime.

	      For example, kinit -l 5:30 or kinit -l 5h30m.

	      If  the -l option is not specified, the default ticket lifetime (configured by each
	      site) is used.  Specifying a ticket lifetime longer than the maximum  ticket  life-
	      time  (configured  by  each  site)  will not override the configured maximum ticket

       -s start_time
	      (duration string.)  Requests a postdated ticket.	Postdated tickets are issued with
	      the  invalid  flag set, and need to be resubmitted to the KDC for validation before

	      start_time specifies the duration of the delay before the ticket can become valid.

       -r renewable_life
	      (duration string.)  Requests renewable tickets, with a  total  lifetime  of  renew-

       -f     requests forwardable tickets.

       -F     requests non-forwardable tickets.

       -p     requests proxiable tickets.

       -P     requests non-proxiable tickets.

       -a     requests tickets restricted to the host's local address[es].

       -A     requests tickets not restricted by address.

       -C     requests canonicalization of the principal name, and allows the KDC to reply with a
	      different client principal from the one requested.

       -E     treats the principal name as an enterprise name (implies the -C option).

       -v     requests that the ticket-granting ticket in the cache (with the invalid  flag  set)
	      be  passed  to  the KDC for validation.  If the ticket is within its requested time
	      range, the cache is replaced with the validated ticket.

       -R     requests renewal of the ticket-granting ticket.  Note that an expired ticket cannot
	      be renewed, even if the ticket is still within its renewable life.

       -k [-i | -t keytab_file]
	      requests a ticket, obtained from a key in the local host's keytab.  The location of
	      the keytab may be specified with the -t keytab_file option, or with the  -i  option
	      to  specify the use of the default client keytab; otherwise the default keytab will
	      be used.	By default, a host ticket for the local host is requested, but any  prin-
	      cipal  may be specified.	On a KDC, the special keytab location KDB: can be used to
	      indicate that kinit should open the KDC database and  look  up  the  key	directly.
	      This  permits  an  administrator	to  obtain tickets as any principal that supports
	      authentication based on the key.

       -n     Requests anonymous processing.  Two types of anonymous principals are supported.

	      For  fully  anonymous  Kerberos,	configure  pkinit  on  the  KDC   and	configure
	      pkinit_anchors in the client's krb5.conf(5).  Then use the -n option with a princi-
	      pal of the form @REALM (an empty principal name followed by the at-sign and a realm
	      name).  If permitted by the KDC, an anonymous ticket will be returned.

	      A  second  form of anonymous tickets is supported; these realm-exposed tickets hide
	      the identity of the client but not the client's realm.  For this mode, use kinit -n
	      with  a  normal  principal  name.   If supported by the KDC, the principal (but not
	      realm) will be replaced by the anonymous principal.

	      As of release 1.8, the MIT Kerberos KDC only supports fully anonymous operation.

       -I input_ccache
	  Specifies the name of a credentials cache that already contains a ticket.  When obtain-
	  ing  that  ticket, if information about how that ticket was obtained was also stored to
	  the cache, that information will be used to affect how new  credentials  are	obtained,
	  including preselecting the same methods of authenticating to the KDC.

       -T armor_ccache
	      Specifies  the name of a credentials cache that already contains a ticket.  If sup-
	      ported by the KDC, this cache will be used to armor the request, preventing offline
	      dictionary attacks and allowing the use of additional preauthentication mechanisms.
	      Armoring also makes sure that the response from the KDC is not modified in transit.

       -c cache_name
	      use cache_name as the Kerberos 5 credentials  (ticket)  cache  location.	 If  this
	      option is not used, the default cache location is used.

	      The default cache location may vary between systems.  If the KRB5CCNAME environment
	      variable is set, its value is used to locate the default	cache.	 If  a	principal
	      name  is specified and the type of the default cache supports a collection (such as
	      the DIR type), an existing  cache  containing  credentials  for  the  principal  is
	      selected or a new one is created and becomes the new primary cache.  Otherwise, any
	      existing contents of the default cache are destroyed by kinit.

       -S service_name
	      specify an alternate service name to use when getting initial tickets.

       -X attribute[=value]
	      specify a pre-authentication attribute and value to be interpreted by pre-authenti-
	      cation modules.  The acceptable attribute and value values vary from module to mod-
	      ule.  This option may be specified multiple times to specify  multiple  attributes.
	      If no value is specified, it is assumed to be "yes".

	      The following attributes are recognized by the PKINIT pre-authentication mechanism:

		     specify where to find user's X509 identity information

		     specify where to find trusted X509 anchor information

		     specify use of RSA, rather than the default Diffie-Hellman protocol

       kinit uses the following environment variables:

	      Location	of  the  default Kerberos 5 credentials cache, in the form type:residual.
	      If no type prefix is present, the FILE type is assumed.  The type  of  the  default
	      cache may determine the availability of a cache collection; for instance, a default
	      cache of type DIR causes caches within the directory to be present in  the  collec-

	      default location of Kerberos 5 credentials cache

	      default location for the local host's keytab.

       klist(1), kdestroy(1), kerberos(1)


       1985-2013, MIT

1.11.3											 KINIT(1)
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