YPSYNC(8) System Manager's Manual YPSYNC(8)
ypsync - collect most up-to-date NIS maps
/usr/etc/yp/ypsync [ -r ] [ -u ]
Available only on Sun 386i systems running a SunOS 4.0.x release or
earlier. Not a SunOS 4.1 release feature.
ypsync gathers current Network Information Service (NIS) maps to the
local NIS server. When invoked with no arguments, it polls all the NIS
servers listed in the /etc/ypservers NIS map for the maps they serve,
and the order of those maps. If there are any new maps that the local
server does not have, or if there are maps that are more current than
the local server's copy, it excutes ypxfr(8) to transfer those maps to
the local server.
ypsync eliminates the need for cron(8) jobs to ensure that NIS map
updates are eventually transmitted to all NIS servers, and supports
different NIS maps having different masters. It is invoked periodi-
cally by ypserv(8).
-r When invoked with the -r flag, ypsync re-creates the local
/var/yp directory and databases if needed. This facility is
used when upgrading servers, since they can automatically
retrieve NIS maps without needing manual intervention. The NIS
master of the ypservers map can also designate new servers,
which would automatically pick up their new maps on reboot.
-u When invoked with the -u flag, ypsync updates the list of NIS
servers on the master of the ypservers NIS map to include the
local system if it does not already, and then get copies of all
the NIS databases. A user invoking ypsync -u may not be root,
and must have the networks privilege in the NIS group map.
ypupdate(3), ypserv(8), ypxfr(8)
Sun386i Advanced Administration
System and Network Administration
The Network Information Service (NIS) was formerly known as Sun Yellow
Pages (YP). The functionality of the two remains the same; only the
name has changed. The name Yellow Pages is a registered trademark in
the United Kingdom of British Telecommunications plc, and may not be
used without permission.
10 March 1989 YPSYNC(8)