domainname(8)
NAME
domainname - set or display name of current domain
nisdomainname - set or display name of current NIS(YP) domain
ypdomainname - set or display name of current NIS(YP) domain
SYNOPSYS
domainname [ domain ]
nisdomainname [ domain ]
ypdomainname [ domain ]
DESCRIPTION
Without an argument, domainname displays the name of the current NIS domainname of the system. domainname uses the getdomainname(2) function for getting the domainname, nisdomainname and ypdomainname are using yp_get_default_domain(3).
Only the super-user can set the name of the domain  by  specifying  the
new domain as an argument. All three programs uses setdomainname(2) for
this. Bear in mind, that already running programs may continue  to  use
the old domainname.
SEE ALSO
getdomainname(2),      setdomainname(2),      yp_get_default_domain(3),
ypbind(8),  ypcat(1),  ypmatch(1),  ypwhich(1),  yppoll(8),  ypserv(8),
yset(8)
AUTHOR
- domainname  is  part  of  the  yp-tools  package,  which was written by
Thorsten Kukuk <kukuk@suse.de>.