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yppush(8)


NAME

   yppush - force propagation of changed NIS databases

SYNOPSIS

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

DESCRIPTION

   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.

OPTIONS

   -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
          verbose.

SEE ALSO

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

BUGS

   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.

AUTHOR

   Thorsten Kukuk <kukuk@suse.de>



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