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| YPPUSH(8) |
Reference Manual |
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.
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>
