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 server 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.

       To specify a port number or use any other yppush options you can edit /var/yp/Makefile directly.

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@linux-nis.org>

NIS Reference Manual                               12/31/2020                                          YPPUSH(8)