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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)