Nis maps not updating

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Either map can be used to enumerate the entries in the passwd file.

However, because hashing libraries do not preserve the order of records, there is no way to reconstruct an exact duplicate of the original file (unless it was sorted).

NIS allows you to replicate the network maps on a set of slave servers.

Providing more than one server helps relieve the load on the master and helps keep clients working even when some servers become unavailable.

In the traditional NIS implementation, you must place at least one NIS server on every physical network.

Clients use IP broadcasting to locate servers, and broadcast packets are not forwarded by routers and gateways.

If it exists, rpc.ypxfrd will only allow requests on a reserved port.

/etc//var/yp/securenets ypserv(8), makedbm(8), yppush(8), ypxfr(8) The Free BSD ypxfrd protocol is not compatible with that used by Sun OS.

One map is used to look up entries by username and the other to look up entries by UID.rpc.ypxfrd uses the same functions for checking a host as ypserv.At first, rpc.ypxfrd will check a request from an address with /var/yp/securenets or the tcp wrapper.A master server maintains the authoritative copies of system files, which are kept in their original locations and formats and are edited with a text editor just as before.A server process makes the contents of the files available over the network.

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