Ubuntu Manpage: yppush - force propagation of changed NIS databases

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.

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