Network Information System
On of the important use for NIS is to keep vital data such as user account information (e.g. /etc/hosts, /etc/passwd and /etc/group files) synchronized between all hosts.Let us see how we can configure NIS. NIS is a server-client based architecture. There will be a NIS server and then a NIS client. Let us see how we can configure this both
NIS SERVER:
You must first check whether we have a package called ypserv installed in the server. Once the package is installed then start the service called ypserv. Then you must give a NIS domain name for the server which can be provided
Also you can verify your domain name by just typing “nisdomainname:. Also there should be entry in the file /etc/sysconfig/network like this
The next thing you have to do is you have to share the directory where you user accounts are residing. For example lets suppose that you creat a directory called home1 and you want to the NIS users home directory to be home1 then you can do this like,
useradd -d /home1/test test
where test is the NIS user. Once created you have to export this file through nfs.This can be done like this
by putting entries in the /etc/exports file
Once you have put these entries make sure that the services portmap and nfs are started. Once you have done this we have to make the yp file which can be done like this,
Then restart the ypserv services. Also make sure that the service called yppasswdd is also turned on These are the things that has to be done on the server side.
NIS CLIENT: To make a NIS client check whether the package ypbind is installed in the system. Also check that the service called autofs is also turned on.Then there are two important files that we need to consider that is /etc/auto.master and /etc/auto.misc . The service autofs is used so that the directory that we use or shared through nfs is automatically mounted and also see that when a nisuser login then a directory is also automatically created.In /etc/auto.master file give the entries like this
Then an entry about our nis server should be given auto.misc like this
Also you have to tell the client which is the NIS server which can be told like this. In the command prompt
Select NIS then select next then give the nisdomain name and the ip of the NIS server and then exit. If it listenx to the NIS server then there wil be no errors shown. now if everything goes well you should be able to login as test in all the NIS clients.
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