domainname man page on SmartOS

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DOMAINNAME(1M)							DOMAINNAME(1M)

NAME
       domainname - set or display name of the current domain

SYNOPSIS
       domainname [name-of-domain]

DESCRIPTION
       Without an argument, domainname displays the name of the current domain
       name used in RPC exchanges, usually referred to	as  the	 NIS  or  NIS+
       domain  name.   This  name  typically  encompasses  a group of hosts or
       passwd entries under the same administration. The domainname command is
       used by various components of Solaris to resolve names for entries such
       as are found in passwd, hosts and aliases. By default, naming  services
       such as NIS and NIS+ use domainname to resolve names.

       With appropriate privileges (root or an equivalent role [see rbac(5)]),
       you can set the name of the domain by specifying the name as  an	 argu‐
       ment to the domainname command.

       The  domain  name  for various naming services can also be set by other
       means. For example, ypinit can be used to specify  a  different	domain
       for all NIS calls. The domain name of the machine is usually set during
       boot time through  the  domainname  command  by	the  svc:/system/iden‐
       tity:domain  service.  If  the  new  domain  name  is  not saved in the
       /etc/defaultdomain file, the machine reverts to the old domain after it
       reboots.

       The  sendmail(1M)  daemon,  as  shipped	with Solaris, and the sendmail
       implementation  provided	 by  sendmail.org  (formerly  referred	to  as
       "Berkeley 8.x sendmail") both attempt to determine a local host's fully
       qualified host name at startup and both pursue follow-up actions if the
       initial	search	fails.	It  is in these follow-up actions that the two
       implementations differ.

       Both implementations use a standard Solaris  or	Unix  system  call  to
       determine  its fully qualified host name at startup, following the name
       service priorities specified in nsswitch.conf(4). To  this  point,  the
       Solaris and sendmail.org versions behave identically.

       If  the request for a fully qualified host name fails, the sendmail.org
       sendmail sleeps for 60 seconds, tries again, and, upon continuing fail‐
       ure, resorts to a short name. The Solaris version of sendmail makes the
       same initial  request,  but  then,  following  initial  failure,	 calls
       domainname. If successful, the sleep is avoided.

       On  a Solaris machine, if you run the sendmail.org version of sendmail,
       you get the startup behavior (omitting the domainname  call)  described
       above.  If you run the Solaris sendmail, the domainname call is made if
       needed.

       If the Solaris sendmail cannot determine the fully qualified host name,
       use  check-hostname(1M) as a troubleshooting aid. This script can offer
       guidance as to appropriate corrective action.

FILES
       /etc/defaultdomain

       /etc/nsswitch.conf

SEE ALSO
       NIS+(1), nischown(1), nispasswd(1), svcs(1), check-hostname(1M),	 host‐
       config(1M),   named(1M),	  nisaddcred(1M),   sendmail(1M),  svcadm(1M),
       ypinit(1M), sys-unconfig(1M), aliases(4),  defaultdomain(4),  hosts(4),
       nsswitch.conf(4), passwd(4), attributes(5), rbac(5), smf(5)

NOTES
       The  domainname	service is managed by the service management facility,
       smf(5), under the service identifier:

	 svc:/system/identity:domain

       Administrative actions on this service, such as enabling, disabling, or
       requesting  restart,  can  be performed using svcadm(1M). The service's
       status can be queried using the svcs(1) command.

				  Mar 8, 2006			DOMAINNAME(1M)
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