KINIT(1)						      General Commands Manual							  KINIT(1)

NAME

       kinit - obtain and cache Kerberos ticket-granting ticket

SYNOPSIS

       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][-T armor_ccache] [-X attribute[=value]] [principal]

DESCRIPTION

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

OPTIONS

       -V     display verbose output.

       -l lifetime
	      requests a ticket with the lifetime lifetime.  The value for lifetime must be followed immediately by one of  the  following  delim-
	      iters:

		 s  seconds
		 m  minutes
		 h  hours
		 d  days

	      as in "kinit -l 90m".  You cannot mix units; a value of `3h30m' will result in an error.

	      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 lifetime (configured by each site) results in a ticket with the maximum lifetime.

       -s start_time
	      requests a postdated ticket, valid starting at start_time.  Postdated tickets are issued with the invalid flag set, and need  to	be
	      fed back to the kdc before use.

       -r renewable_life
	      requests	renewable tickets, with a total lifetime of renewable_life.  The duration is in the same format as the -l option, with the
	      same delimiters.

       -f     request forwardable tickets.

       -F     do not request forwardable tickets.

       -p     request proxiable tickets.

       -P     do not request proxiable tickets.

       -a     request tickets with the local address[es].

       -A     request address-less tickets.

       -C     requests canonicalization of the principal name.

       -E     treats the principal name as an enterprise name.

       -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 [-t keytab_file]
	      requests a host ticket, obtained from a key in the local host's keytab file.  The name and location of the keytab file may be speci-
	      fied with the -t keytab_file option; otherwise the default name and location will be used.

       -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.  Then use the -n option with a principal	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.

       -T armor_ccache
	      Specifies the name of a credential cache that already contains a ticket.	If supported by the KDC, This ccache will be used to armor
	      the  request so that an attacker would have to know both the key of the armor ticket and the key of the principal used for authenti-
	      cation in order to attack the request. 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 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.  Any existing contents of the 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 passed to pre-authentication plugins.  The  acceptable  attribute	and  value
	      values  vary  from pre-authentication plugin to plugin.  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 OpenSSL pkinit
	      pre-authentication mechanism:
		 X509_user_identity=value
		    specify where to find user's X509 identity information
		 X509_anchors=value
		    specify where to find trusted X509 anchor information
		 flag_RSA_PROTOCOL[=yes]
		    specify use of RSA, rather than the default Diffie-Hellman protocol

ENVIRONMENT

       Kinit uses the following environment variables:

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

FILES

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

       /etc/krb5.keytab   default location for the local host's keytab file.

SEE ALSO

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

																	  KINIT(1)