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YPPUSH(8)                   System Manager's Manual                  YPPUSH(8)

       yppush - force propagation of changed NIS map

       /usr/etc/yp/yppush [ -v ] [ -d domain ] mapname

       yppush  copies a new version of a Network Information Service (NIS) map
       from the master NIS server to the slave NIS servers.   It  is  normally
       run  only on the master NIS server by the Makefile in /var/yp after the
       master databases are changed.  It first constructs a list of NIS server
       hosts  by reading the NIS map ypservers within the domain.  Keys within
       the map ypservers are the ASCII names of the machines on which the  NIS
       servers run.

       A  "transfer map" request is sent to the NIS server at each host, along
       with the information needed by the transfer agent  (the  program  which
       actually moves the map) to call back the yppush .  When the attempt has
       completed (successfully or not), and the transfer agent has sent yppush
       a  status  message, the results may be printed to stdout.  Messages are
       also printed when a transfer is not possible;  for  instance  when  the
       request  message  is  undeliverable,  or  when  the  timeout  period on
       responses has expired.

       Refer to ypfiles(5) and ypserv(8) for an overview of the NIS service.

       -d domain
              Specify a domain.

       -v     Verbose.  This prints messages when each server is  called,  and
              for each response.  If this flag is omitted, only error messages
              are printed.


       ypfiles(5), ypserv(8), ypxfr(8)

       NIS protocol specification

       In the current implementation (version 2 NIS  protocol),  the  transfer
       agent  is  ypxfr(8), which is started by the ypserv program.  If yppush
       detects that it is speaking to a version 1 NIS protocol server, it uses
       the older protocol, sending a version 1 YPPROC_GET request and issues a
       message to that effect.  Unfortunately, there is no way of  knowing  if
       or  when  the  map transfer is performed for version 1 servers.  yppush
       prints a message saying that an "old-style" message has been sent.  The
       system  administrator  should  later check to see that the transfer has
       actually taken place.

       The Network Information Service (NIS) was formerly known as Sun  Yellow
       Pages  (YP).   The  functionality of the two remains the same; only the
       name has changed.  The name Yellow Pages is a registered  trademark  in
       the  United  Kingdom  of British Telecommunications plc, and may not be
       used without permission.

                               14 December 1987                      YPPUSH(8)