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>