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           /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. Mes-
           sages 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 paral-
                  lel 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 con-
           that in NIS version 2. This version of yppush has support for transfer-
           ring maps to NIS v2 systems only.


           Thorsten Kukuk <>

    YP Server August 2002 YPPUSH(8)


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