NAME

kinit — acquire initial tickets

SYNOPSIS

DESCRIPTION

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.

-canonicalize

ask the KDC canonicalize the client name and server name. Useful with enterprise names, PK-INIT, and LKDC realms when the user doesn't know its real kerberos user name.

-f, --forwardable

Get ticket that can be forwarded to another host.

-t keytabname, --keytab=keytabname

 

-f --no-forwardable

Get ticket that can be forwarded to another host, or if the negative flags use, don't get a forwardable flag.

-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.

--renewable

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.

--password-file=filename

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

--fcache-version=version-number

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.

--anonymous

Request an anonymous ticket (which means that the ticket will be issued to an anonymous principal, typically “anonymous@REALM”).

-V, --verbose

Print slightly more verbose output from kinit when successful.

--enterprise

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.

--afslog

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.

ENVIRONMENT

KRB5CCNAME

Specifies the default credentials cache.

KRB5_CONFIG

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

KRBTKFILE

Specifies the Kerberos 4 ticket file to store version 4 tickets in.

SEE ALSO

kdestroy(1), klist(1), krb5_appdefault(3), krb5.conf(5), ktutil(8)