Summary

In this chapter, we have examined the installation and configuration of the Network Information Service. Using NIS is necessary in large network environments where changes must be made. Although NIS is a difficult and complex package to master, it is very flexible and can reduce administrator burden greatly in many situations.

Questions

1.	What does the nisserver command do? Sets up a root NIS+ domain Sets up a nonroot NIS+ domain Starts the NIS+ daemon None of the above
2.	What does the nispopulate command do? Adds clients to a NIS+ table Adds clients to a NIS map Extracts data from existing /etc files and inserts it into NIS+ tables None of the above
3.	What does the nisgrpadm command do? Adds users to a NIS+ group Adds users to a NIS map Extracts data from existing /etc files and inserts it into NIS+ tables None of the above
4.	What does the nisclient command do? Adds clients to a NIS+ table Adds clients to a NIS map Extracts data from existing /etc files and inserts it into NIS+ tables Assigns the role of replica server
5.	What command would you use to create a NIS+ configuration checkpoint? nisclient nisping nischeck nisgrpadm
6.	What does the Auto_Home table do? Enables some groups within a domain to access a single home directors. Enables all groups within a domain to access multiple home directories. Enables all users within a domain to access a single home directory. Enables all users to have an account on each system in the domain.
7.	What does the Netgroups table do? Enables some groups within a domain to access a single home directory. Enables all groups within a domain to access multiple home directories. Enables all users within a domain to access a single home directory. Contains authorization lists that can be used to govern access to resources within a network.
8.	Which are valid object permissions? c, d, m, r x, d, m r r, w, x, S r, w, x, C
9.	What operands are used to specify access rights for specific classes of users? a, d, S, x S, g, m, x A, g, x, S a, g, n, o, w
10.	What does the niscat command do? It s used to retrieve the contents of objects within the domain It s used to display user lists It s used to grant/deny access to network resources It s used to display lists of current access permissions

Answers

1.	A. The nisserver command sets up a root NIS+ domain.
2.	C. The nispopulate command extracts data from existing /etc files and inserts it into NIS+ tables.
3.	A. The nisgrpadm command adds users to a NIS+ group.
4.	D. The nisclient command assigns the role of replica server.
5.	B. The nisping command is used to create a NIS+ configuration checkpoint.
6.	C. The Auto-Home table enables all users within a domain to access a single home directory.
7.	D. The Netgroups table contains authorization lists that can be used to govern access to resources.
8.	A. Valid object permissions are c, d, m, and r.
9.	D. The operands a, g, n, o, and w are used to specify access rights for specific classes of users.
10.	A. The niscat command is used to retrieve the contents of objects within the domain.