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>