.\" clients/kinit/kinit.M
.\"
.\" Copyright 1990 by the Massachusetts Institute of Technology.
.\"
.\" Export of this software from the United States of America may
.\"   require a specific license from the United States Government.
.\"   It is the responsibility of any person or organization contemplating
.\"   export to obtain such a license before exporting.
.\" 
.\" WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
.\" distribute this software and its documentation for any purpose and
.\" without fee is hereby granted, provided that the above copyright
.\" notice appear in all copies and that both that copyright notice and
.\" this permission notice appear in supporting documentation, and that
.\" the name of M.I.T. not be used in advertising or publicity pertaining
.\" to distribution of the software without specific, written prior
.\" permission.  M.I.T. makes no representations about the suitability of
.\" this software for any purpose.  It is provided "as is" without express
.\" or implied warranty.
.\" "
.TH KINIT 1
.SH NAME
kinit \- obtain and cache Kerberos ticket-granting ticket
.SH SYNOPSIS
.TP
.B kinit
.ad l
[\fB\-l\fP \fIlifetime\fP] [\fB\-s\fP \fIstart_time\fP] [\fB\-v\fP]
[\fB\-p\fP] [\fB\-f\fP] [\fB\-k\fP [\fB\-t\fP \fIkeytab_file\fP]]
[\fB\-r\fP \fIrenewable_life\fP] [\fB\-R\fP] [\fB\-c\fP
\fIcache_name\fP] [\fB\-S\fP \fIservice_name\fP] [\fIprincipal\fP]
.ad b
.br
.SH DESCRIPTION
.I kinit
obtains and caches an initial ticket-granting ticket for
.IR principal .
.SH OPTIONS
.TP
\fB\-l\fP \fIlifetime\fP
requests a ticket with the lifetime
.IR lifetime .
The value for
.I lifetime
must be followed immediately by one of the following delimiters:
.sp
.nf
.in +.3i
\fBs\fP  seconds
\fBm\fP  minutes
\fBh\fP  hours
\fBd\fP  days
.in -.3i
.fi
.sp
as in "kinit -l 90m".  You cannot mix units; a value of `3h30m' will
result in an error.
.sp
If the
.B \-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.
.TP
\fB\-s\fP \fIstart_time\fP
requests a postdated ticket, valid starting at
.IR start_time .
Postdated tickets are issued with the
.I invalid
flag set, and need to be fed back to the kdc before use.
.TP
.B \-v
requests that the ticket granting ticket in the cache (with the 
.I 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.
.TP
.B \-p
request proxiable tickets.
.TP
.B \-f
request forwardable tickets.
.TP
\fB\-r\fP \fIrenewable_life\fP
requests renewable tickets, with a total lifetime of
.IR renewable_life .
The duration is in the same format as the
.B \-l
option, with the same delimiters.
.TP
.B \-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.
.TP
\fB\-k\fP [\fB\-t\fP \fIkeytab_file\fP]
requests a host ticket, obtained from a key in the local host's
.I keytab
file.  The name and location of the keytab file may be specified with
the
.B \-t
.I keytab_file
option; otherwise the default name and location will be used.
.TP
\fB\-c\fP \fIcache_name\fP
use
.I cache_name
as the credentials (ticket) cache name and location; if this option is
not used, the default cache name and location are used.
.sp
The default credentials cache may vary between systems.  If the
.B KRB5CCNAME
environment variable is set, its value is used to name the default
ticket cache.  Any existing contents of the cache are destroyed by
.IR kinit .
.TP
\fB\-S\fP \fIservice_name\fP
specify an alternate service name to use when
getting initial tickets.
.SH ENVIRONMENT
.B Kinit
uses the following environment variable:
.TP "\w'.SM KRB5CCNAME\ \ 'u"
.SM KRB5CCNAME
Location of the credentials (ticket) cache.
.SH FILES
.TP "\w'/tmp/krb5cc_[uid]\ \ 'u"
/tmp/krb5cc_[uid]
default credentials cache ([uid] is the decimal UID of the user).
.TP
/etc/krb5.keytab
default location for the local host's
.B keytab
file.
.SH SEE ALSO
klist(1), kdestroy(1), krb5(3)