yppush - force propagation of changed NIS databases
[ -d domain
] [ -t timeout
[ --parallel #
| --port port
] [ -h
] [ -v
] mapname ...
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.
does not invoke yppush
by default, the
line must be commented out.
first constructs a list of NIS slave servers by reading the NIS
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
- -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.
- Verbose mode: causes yppush to print debugging
messages as it runs. Note specifying this flag twice makes yppush
even more verbose.
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.
Thorsten Kukuk <firstname.lastname@example.org>