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DOMAINNAME(1) General Commands Manual DOMAINNAME(1)

domainname
set or print YP domain of current host system

domainname [
name-of-domain
]

The domainname utility prints the YP domain name of the current host. The superuser can set the domain name by supplying a /etc/defaultdomain file (see defaultdomain(5)). This is used at system boot time by rc(8) to initialize the domainname.

hostname(1), getdomainname(3), setdomainname(3), defaultdomain(5), rc(8), yp(8)

The domainname utility is derived from the hostname(1) utility, which appeared in 4.2BSD. The domainname utility appeared in NetBSD 0.8.
May 27, 2012 OpenBSD-current