kinit - obtain and cache Kerberos ticket-granting ticket
[-5] [-4] [-V] [-l lifetime] [-s start_time] [-r
renewable_life] [-p | -P] [-f | -F] [-a] [-A] [-v] [-R]
[-k [-t keytab_file]] [-c cache_name] [-S service_name]
kinit obtains and caches an initial ticket-granting ticket
for principal.Thetypicaldefaultbehavior Kerberos 5 tickets.
However, if kinit was built with both Kerberos 4 support and
with the default behavior of acquiring both types of tick-
ets, it will try to acquire both Kerberos 5 and Kerberos 4
by default. Any documentation particular to Kerberos 4 does
not apply if Kerberos 4 support was not built into kinit.
-5 get Kerberos 5 tickets. This overrides whatever the
default built-in behavior may be. This option may be
used with -4
-4 get Kerberos 4 tickets. This overrides whatever the
default built-in behavior may be. This option is only
available if kinit was built with Kerberos 4 compati-
bility. This option may be used with -5
-V display verbose output.
requests a ticket with the lifetime lifetime. The
value for lifetime must be followed immediately by one
of the following delimiters:
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 life-
time (configured by each site) results in a ticket with
the maximum lifetime.
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. (Not applicable to Kerberos 4.)
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. (Not applica-
ble to Kerberos 4.)
-f request forwardable tickets. (Not applicable to Ker-
-F do not request forwardable tickets. (Not applicable to
-p request proxiable tickets. (Not applicable to Kerberos
-P do not request proxiable tickets. (Not applicable to
-a request tickets with the local address[es]. (Not
applicable to Kerberos 4.)
-A request address-less tickets. (Not applicable to Ker-
-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.
(Not applicable to Kerberos 4.)
-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. When using
this option with Kerberos 4, the kdc must support Ker-
beros 5 to Kerberos 4 ticket conversion.
-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 specified with the -t keytab_file
option; otherwise the default name and location will be
used. When using this option with Kerberos 4, the kdc
must support Kerberos 5 to Kerberos 4 ticket conver-
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.
(Note: The default name for Kerberos 4 comes from the
KRBTKFILE environment variable. This option does not
apply to Kerberos 4.)
specify an alternate service name to use when getting
initial tickets. (Applicable to Kerberos 5 or if using
both Kerberos 5 and Kerberos 4 with a kdc that supports
Kerberos 5 to Kerberos 4 ticket conversion.)
Kinit uses the following environment variables:
KRB5CCNAME Location of the Kerberos 5 credentials
KRBTKFILE Filename of the Kerberos 4 credentials
/tmp/krb5cc_[uid] default location of Kerberos 5 creden-
tials cache ([uid] is the decimal UID of
/tmp/tkt[uid] default location of Kerberos 4 credentials
cache ([uid] is the decimal UID of the user).
default location for the local host's keytab
klist(1), kdestroy(1), krb5(3)
Man(1) output converted with