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heimdal-kinit - Man Page

acquire initial tickets


kinit[--afslog] [-c cachename | --cache=cachename] [-f | --forwardable] [-F | --no-forwardable] [-t keytabname | --keytab=keytabname] [-l time | --lifetime=time] [-p | --proxiable] [-R | --renew] [--renewable] [-r time | --renewable-life=time] [-S principal | --server=principal] [-s time | --start-time=time] [-k | --use-keytab] [-v | --validate] [-e enctypes | --enctypes=enctypes] [-a addresses | --extra-addresses=addresses] [--password-file=filename] [--fcache-version=version-number] [-A | --no-addresses] [-n | --anonymous] [--enterprise] [--version] [--help] [principal [command]]


kinit is used to authenticate to the Kerberos server as principal, or if none is given, a system generated default (typically your login name at the default realm), and acquire a ticket granting ticket that can later be used to obtain tickets for other services.

Supported options:

-c cachename --cache=cachename

The credentials cache to put the acquired ticket in, if other than default.

-f --forwardable

Obtain a ticket than can be forwarded to another host.

-F --no-forwardable

Do not obtain a forwardable ticket.

-t keytabname, --keytab=keytabname

Don't ask for a password, but instead get the key from the specified keytab.

-l time, --lifetime=time

Specifies the lifetime of the ticket. The argument can either be in seconds, or a more human readable string like ‘1h’.

-p, --proxiable

Request tickets with the proxiable flag set.

-R, --renew

Try to renew ticket. The ticket must have the ‘renewable’ flag set, and must not be expired.


The same as --renewable-life, with an infinite time.

-r time, --renewable-life=time

The max renewable ticket life.

-S principal, --server=principal

Get a ticket for a service other than krbtgt/LOCAL.REALM.

-s time, --start-time=time

Obtain a ticket that starts to be valid time (which can really be a generic time specification, like ‘1h’) seconds into the future.

-k, --use-keytab

The same as --keytab, but with the default keytab name (normally FILE:/etc/krb5.keytab).

-v, --validate

Try to validate an invalid ticket.

-e, --enctypes=enctypes

Request tickets with this particular enctype.


read the password from the first line of filename. If the filename is STDIN, the password will be read from the standard input.


Create a credentials cache of version version-number.

-a, --extra-addresses=enctypes

Adds a set of addresses that will, in addition to the systems local addresses, be put in the ticket. This can be useful if all addresses a client can use can't be automatically figured out. One such example is if the client is behind a firewall. Also settable via libdefaults/extra_addresses in krb5.conf(5).

-A, --no-addresses

Request a ticket with no addresses.

-n, --anonymous

Request an anonymous ticket. With the default (false) setting of the historical_anon_pkinit configuration parameter, if the principal is specified as @REALM, then anonymous PKINIT will be used to acquire an unauthenticated anonymous ticket and both the client name and (with fully RFC-comformant KDCs) realm in the returned ticket will be anonymized. Otherwise, authentication proceeds as normal and the anonymous ticket will have only the client name anonymized. With historical_anon_pkinit set to true, the principal is interpreted as a realm even without an at-sign prefix, and it is not possible to obtain authenticated anonymized tickets.


Parse principal as a enterprise (KRB5-NT-ENTERPRISE) name. Enterprise names are email like principals that are stored in the name part of the principal, and since there are two @ characters the parser needs to know that the first is not a realm. An example of an enterprise name is “lha@e.kth.se@KTH.SE”, and this option is usually used with canonicalize so that the principal returned from the KDC will typically be the real principal name.


Gets AFS tickets, converts them to version 4 format, and stores them in the kernel. Only useful if you have AFS.

The forwardable, proxiable, ticket_life, and renewable_life options can be set to a default value from the appdefaults section in krb5.conf, see krb5_appdefault(3).

If a command is given, kinit will set up new credentials caches, and AFS PAG, and then run the given command. When it finishes the credentials will be removed.



Specifies the default credentials cache.


The file name of krb5.conf, the default being /etc/krb5.conf.

See Also

kdestroy(1), klist(1), krb5_appdefault(3), krb5.conf(5)


April 25, 2006