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       yppush - force propagation of changed NIS databases


       /usr/sbin/yppush  [  -d domain ] [ -t timeout ] [ --parallel # | --port
       port ] [ -h host ] [ -v ] mapname ...


       yppush copies updated NIS databases  (or  maps)  from  the  master  NIS
       server  to  the  slave  servers within a NIS domain. It is normally run
       only on the NIS master by /var/yp/Makefile after the  master  databases
       are  changed.   /var/yp/Makefile does not invoke yppush by default, the
       NOPUSH=true line must be commented out.
       yppush first constructs a list of NIS slave servers by reading the  NIS
       map  ypservers  within  the  domain.   A destination host (or a list of
       hosts with multiple -h commands) can also be specified on  the  command
       line.   A  "transfer  map"  request  is  sent to the NIS serger at each
       slave, along with the information needed by the transfer agent ypxfr(8)
       to  callback  to  yppush,  which  may  be printed the result to stderr.
       Messages are also printed when a transfer is not possible; for instance
       when the request message is undeliverable.


       -d domain
              Specify  a  particular  domain. The NIS domain of the local host
              system is used by default. If the local host’s  domain  name  is
              not set, the domain name must be specified with this flag.

       -t timeout
              The  timeout flag is used to specify a timeout value in seconds.
              This timeout controls how long yppush will wait for  a  response
              from a slave server before sending a map transfer request to the
              next slave server in the list.  By default, yppush will wait  90
              seconds. For big maps, this is not long enough.

       --parallel #, -p #
              yppush  normally  performs  transfers  serially, meaning that it
              will send a map transfer request to one slave  server  and  then
              wait  for  it  to  respond  before sending the next map transfer
              request to the next slave  server.  In  environments  with  many
              slaves,  it  is more efficient to initiate several map transfers
              at once so that the transfers can take place in parallel.  It is
              not possible to run in parallel and assign a fixed port with the
              --port flag

       --port port
              specify a port for yppush to  listen  on.   By  default,  yppush
              will  ask  portmap(8)  to assign it a random port number.  It is
              not possible to assign a  port  with  this  option  and  run  in
              parallel with the --parallel or -p flag

       -h host
              The  host flag can be used to transfer a map to a user-specified
              machine or group of machines instead  of  the  list  of  servers
              contained in the ypservers map. A list of hosts can be specified
              by using multiple instances of the -h flag.

       -v     Verbose mode: causes yppush to print debugging  messages  as  it
              runs.  Note  specifying  this  flag twice makes yppush even more


       domainname(1), ypserv(8), ypxfr(8)


       The mechanism for transferring NIS maps in NIS  v1  is  different  that
       that  in  NIS  version  2.  This  version  of  yppush  has  support for
       transferring maps to NIS v2 systems only.


       Thorsten Kukuk <>