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This is done using MERGE_PASSWD option: The /etc/group file allows passwords to be applied to group settings.Since the /etc/group file needs to be publicly readable, most distros have taken to support shadow group files /etc/gshadow.The option is called MERGE_GROUP: This tool will ask about the secondary NIS servers if you have any.These entries will be stored in the /var/yp/ypservers file.We will need a few minutes to copy the data from world.
and if the Master server becomes unavailble, wil the Slave server take over Seamlessly or do I need to do something? lehan No reboots are necessary and there should be no downtime.
The NIS is a database that contains a series of tables.
Each table is created from text files like /etc/passwd, /etc/services and any other tabular files.
The Linux NIS server (Network Information Service) is a server used for sharing critical data stored in flat files between systems on a network, it is often ideal to have a common repository (such as NIS) for storing user and group information that is traditionally stored in flat files like /etc/passwd. By making such files available via the NIS server, that would allow any remote NIS client machine to access or query the data in these shared files and use them as extensions to the local versions. Any tabular file which at least has one column with a unique value can be shared via NIS like /etc/services file.
The main benefit from using NIS server is that you keep your data and files, and if your data is updated, all updates be propagated to all users.