KINIT(1) General Commands Manual KINIT(1)
kinit – acquire initial tickets
kinit [--afslog] [-c cachename | --cache=cachename] [--canonicalize]
[-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]
[-A | --no-addresses] [--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.
-c cachename --cache=cachename
The credentials cache to put the acquired ticket in, if other than
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.
Get ticket that can be forwarded to another host.
-t keytabname, --keytab=keytabname
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
-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’.
Request tickets with the proxiable flag set.
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.
The same as --keytab, but with the default keytab name (normally
Try to validate an invalid ticket.
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.
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).
Request a ticket with no addresses.
Request an anonymous ticket (which means that the ticket will be
issued to an anonymous principal, typically “anonymous@REALM”).
Print slightly more verbose output from kinit when successful.
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 “email@example.com@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
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
Specifies the default credentials cache.
The file name of krb5.conf, the default being /etc/krb5.conf.
Specifies the Kerberos 4 ticket file to store version 4 tickets in.
kdestroy(1), klist(1), krb5_appdefault(3), krb5.conf(5), ktutil(8)
HEIMDAL April 25, 2006 HEIMDAL