ultrix man page for domainname

domainname(1yp) 														   domainname(1yp)

Name
       domainname - display or set the name of the current domain for this system

Syntax
       domainname [nameofdomain]

Description
       The  command,  when  used without an argument, displays the name of the current domain.	The startup script must be used to set the current
       domain name before any other YP commands can be issued.

       A domain is a logical grouping of networked-connected systems established for the purpose of sharing a common set of data  files.   Domains
       are only used by the yellow pages (YP) service and are called YP domains.  A YP domain is a directory in established through the use of the
       command, where a YP server holds all of the YP maps.  Each YP map contains a set of keys and associated key values.  For example, in a  map
       called  the  host  names stored there constitute the keys.  The corresponding internet addresses of each host constitute the associated key
       values.

See Also
       ypfiles(5yp), ypsetup(8yp)

																   domainname(1yp)