NAME
kinit - obtain and cache Kerberos ticket-granting ticket
SYNOPSIS
kinit
[-l lifetime] [-s start_time] [-v]
[-p|--proxiable|--noproxiable]
[-f|--forwardable|--noforwardable] [-k [-t
keytab_file]] [-r renewable_life] [-R] [-c cache_name]
[-S service_name] [principal] [--version]
DESCRIPTION
kinit obtains and caches an initial ticket-granting ticket
for principal.
OPTIONS
-l lifetime
requests a ticket with the lifetime lifetime. The
value for lifetime must be followed immediately by one
of the following delimiters:
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 life-
time (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.
-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.
-p | --proxiable | --noproxiable
The -p and --proxiable flags request proxiable tickets.
The --noproxiable flag explicitly requests non-
proxiable tickets, which is useful for overriding the
application defaults in the host's krb5.conf(5) file.
-f | --forwardable | --noforwardable
The -f and --forwardable flags requests forwardable
tickets. The --noforwardable flag explicitly requests
non-forwardable tickets, which is useful for overriding
the application defaults in the host's krb5.conf(5)
file.
-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.
-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 specified with the -t keytab_file
option; otherwise the default name and location will be
used.
-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. Any
existing contents of the cache are destroyed by kinit.
-S service_name
specify an alternate service name to use when getting
initial tickets.
--version
Prints out the KerbNet release version of the binary
and then exits.
CONFIGURATION
Kinit can be configured in the [libdefaults] section of the
krb5.conf(5) file. Kinit utilizes the forwardable, proxi-
able, and renew_lifetime flags. (See krb5.conf(5) for an
explanation of these flags.)
ENVIRONMENT
Kinit uses the following environment variable:
KRB5CCNAME Location of the credentials (ticket) cache.
FILES
/tmp/krb5cc_[uid] default credentials cache ([uid] is the
decimal UID of the user).
/etc/v5srvtab default location for the local host's
keytab file.
/etc/krb5.conf file containing local host's Kerberos V5
configuration information
SEE ALSO
klist(1), kdestroy(1), krb5(3), krb5.conf(5)