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ypbind(8) [osx man page]

YPBIND(8)						    BSD System Manager's Manual 						 YPBIND(8)

ypbind -- create and maintain a binding to a YP server SYNOPSIS
ypbind [-ypset] [-ypsetme] [-insecure] DESCRIPTION
ypbind finds the server for a particular YP domain and stores information about it in a binding file. This binding information includes the IP address of the server associated with that particular domain and which port the server is using. This information is stored in the direc- tory /var/yp/binding in a file named with the convention DOMAINNAME.version. (The YP system only supplies information on version 2.) When ypbind starts the primary domain (or gets the first request for a new domain), it checks if a file for the domain in question exists in the directory /var/yp/binding (ie. /var/yp/binding/DOMAINNAME.ypservers). If such a file exists, it will list the hosts which ypbind should restrict its server search to. Otherwise, ypbind assumes it will need to use broadcasts to find a valid server. Using either of these tech- niques, ypbind will search for a server willing to serve maps for the client's domain. Once a binding is established, ypbind maintains this binding by periodically communicating with the server to which it is bound. If the binding is somehow lost, e.g by server reboot, ypbind marks the domain as unbound and attempts to re-establish the binding. When the binding is once again successful, ypbind marks the domain as bound and resumes its periodic check. The options are as follows: -ypset ypset(8) may be used to change the server to which a domain is bound. -ypsetme ypset(8) may be used only from this machine to change the server to which a domain is bound. -insecure permit binding to a ypserv(8) on a non-reserved port. This is needed if receiving maps from SunOS 3.x or Ultrix. -d enable debugging output. The -ypset and -ypsetme options are dangerous and should be avoided. For greatest security, the use of a server list in /var/yp/binding/DOMAINNAME.ypservers is recommended. The file should contain a list of valid YP server hostnames, with one hostname per line. The comment character is #. FILES
/var/yp/binding/DOMAINNAME.version - binding file for domainname /var/yp/binding/DOMAINNAME.ypservers - server list for this particular domain SEE ALSO
domainname(1), ypcat(1), ypmatch(1), yppoll(8), ypset(8), ypwhich(1), ypserv(8), yp(8) AUTHOR
Theo de Raadt BSD
October 25, 1994 BSD

Check Out this Related Man Page

ypset(1M)						  System Administration Commands						 ypset(1M)

ypset - point ypbind at a particular server SYNOPSIS
/usr/sbin/ypset [-d ypdomain] [-h host] server DESCRIPTION
In order to run ypset, ypbind must be initiated with the -ypset or -ypsetme options. See ypbind(1M). ypset tells ypbind to get NIS services for the specified ypdomain from the ypserv process running on server. If server is down, or is not running ypserv, this might not be dis- covered until an NIS client process tries to obtain a binding for the domain. At this point, the binding set by ypset is tested by ypbind. If the binding is invalid, ypbind attempts to rebind for the same domain. ypset is useful for binding a client node that is not on a broadcast net, or is on a broadcast net that is not running an NIS server host. It is also useful for debugging NIS client applications, for instance, where an NIS map exists only at a single NIS server host. Where several hosts on the local net are supplying NIS services, ypbind can rebind to another host, even while you attempt to find out if the ypset operation succeeded. For example, if you enter the ypset command below, you might get the subsequent response from ypwhich: example% ypset host1 example% ypwhich host2 The sequence shown above is a function of the NIS subsystem's attempt to load-balance among the available NIS servers, and occurs when host1 does not respond to ypbind because it is not running ypserv (or is overloaded), and host2, running ypserv, obtains the binding. server indicates which NIS server to bind to, and must be specified as a name or an IP address. This works only if the node has a current valid binding for the domain in question and ypbind has been set to allow use of ypset. In most cases, server should be specified as an IP address. ypset tries to bind over a connectionless transport. The NIS library call, yp_all(), uses connection-oriented transport and derives the NIS server's address based on the connectionless address supplied by ypset. Refer to ypfiles(4) for an overview of the NIS name service. OPTIONS
-d ypdomain Use ypdomain, instead of the default domain. -h host Set ypbind's binding on host, instead of locally. Specify host as a name. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWnisu | +-----------------------------+-----------------------------+ SEE ALSO
ypwhich(1), ypfiles(4), attributes(5) SunOS 5.10 14 Sep 1992 ypset(1M)
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