Prevent accidental push of yp maps from slave servers

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ypinit

YPINIT(8)						    BSD System Manager's Manual 						 YPINIT(8)

NAME

     ypinit -- build and install NIS databases

SYNOPSIS

     ypinit -m [domainname]
     ypinit -s master_server [domainname]
     ypinit -u [domainname]

DESCRIPTION

     The ypinit utility is a script which sets up databases on a Network Information Service (NIS) master or slave server.

     On a master server, ypinit creates the /var/yp/$DOMAINNAME directory, the /var/yp/ypservers file, and calls /var/yp/Makefile to create and
     populate an initial set of NIS maps.  The maps are created from local source files using the yp_mkdb(8) utility.  The utility will prompt the
     user for a list of servers that support the specified domain; this list is used to populate the ypservers map.

     On a slave server, ypinit creates the /var/yp/$DOMAINNAME, populates it with copies of the NIS maps from the master.  The maps are obtained
     from the master using the ypxfr(8) utility.  The ypinit utility obtains the list of maps to transfer in one of two ways: if the system is
     configured as an NIS client and is bound to the master server, ypinit is able to use the ypwhich(1) utility to obtain a list of maps exported
     by the master server.  If the system is not configured as a client of the NIS master, ypinit uses a hardcoded list of maps, some of which may
     or may not actually exist on the master.  The system administrator can edit the ypinit script and modify the map list if necessary.  Other-
     wise, individual maps can be transferred manually from the master using ypxfr(8).

OPTIONS

     The ypinit utility supports the following options:

     -m [domainname]
	     Set up a master server.  By default, ypinit sets up a server for the system default domain.  The user can override this default by
	     specifying domainname explicitly.	Maps are constructed from scratch using local files as templates using the yp_mkdb(8) utility.

     -s master_server [domainname]
	     Set up a slave server using master_name as the master.  Maps are copied from master_server to the slave using ypxfr(8).  By default,
	     ypinit sets up a server for the system default domain.  The user can override this default by specifying domainname explicitly.

     -u [domainname]
	     Update the ypservers map on the master server.  When a new slave server is added to a domain, its hostname must be added to the
	     ypservers map so that yppush(8) can propagate updates on the master to all of the slaves.

FILES

     /etc/bootparams	    Bootparams source file
     /etc/ethers	    Ethers data source file
     /etc/group 	    Group source file
     /etc/hosts 	    Hostname/IP address source file
     /etc/netid 	    RPC netid source file
     /etc/networks	    Networks source file
     /etc/protocols	    Protocols source file
     /etc/publickey	    RPC public key/secret key source file
     /etc/services	    Services data source file
     /etc/shells	    Shells source file
     /var/yp/master.passwd  Passwd database source file
     /var/yp/netgroup	    Netgroup data source file
     /var/yp/ypservers	    Ypservers source file (generated by ypinit)

SEE ALSO

     mknetid(8), revnetgroup(8), yp(8), yp_mkdb(8), yppush(8), ypserv(8), ypxfr(8)

HISTORY

     This version of ypinit is based on the ypinit script in OpenBSD.  It first appeared in FreeBSD 3.0.

AUTHORS

     The original script was written by Mats O Jansson <moj@stacken.kth.se>.  It was modified for FreeBSD by Bill Paul <wpaul@ctr.columbia.edu>.

BSD
								 November 10, 1997							       BSD

UNIX for Advanced & Expert Users