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NIS(8) NetBSD System Manager's Manual NIS(8)
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by Kimmo Suominen.
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nis, yp -- description of the NIS (formerly YP) subsystem
ypset [-h host] [-d domain] server
yppoll [-h host] [-d domain] mapname
ypcat [-kt] [-d domainname] mapname
ypmatch [-kt] [-d domainname] key ... mapname
ypwhich [-d domain] [[-t] -m [mname] | host]
ypserv [-d] [-x]
yppush [-d domainname] [-h hostname] [-v] mapname
ypxfr [-bcf] [-d domain] [-h host] [-s domain] [-C tid prog ipadd port]
ypinit -m [domainname]
ypinit -s master_server [domainname]
rpc.yppasswdd [-noshell] [-nogecos] [-nopw] [-m arg1 arg2 ...]
The NIS subsystem allows network management of passwd and group file
entries through the functions getpwent(3) and getgrent(3). NIS also pro-
vides hooks for other client programs, such as amd(8) and
rpc.bootparamd(8), that can use NIS maps.
Password maps in standard YP are insecure, because the pw_passwd field is
accessible by any user. A common solution to this is to generate a secure
map (using ``makedbm -s'') which can only be accessed by a client bound
to a privileged port. To activate the secure map, see the appropriate
comment in /var/yp/Makefile.yp.
The NIS subsystem is conditionally started in /etc/rc. See the
/etc/rc.conf file for configuration variables.
domainname(1), ypcat(1), ypmatch(1), ypwhich(1), ypclnt(3), group(5),
hosts_access(5), nsswitch.conf(5), passwd(5), rc.conf(5), rc(8),
ypbind(8), ypinit(8), yppoll(8), yppush(8), ypserv(8), ypset(8),
The NIS client subsystem was originally written by Theo de Raadt to be
compatible with Sun's implementation. The NIS server suite was origi-
nally written by Mats O Jansson.
If ypbind(8) cannot find a server, the system behaves the same way as
Sun's code: it hangs.
The `secure map' feature is not compatible with non-BSD implementations
as found e.g. in Solaris.
NetBSD 9.1 February 26, 2005 NetBSD 9.1