Congratulations! You have installed TCP/IP in the kernel, configured the network interface, and configured routing. At this point, you have completed all of the configuration tasks required to run TCP/IP on a Unix system. While none of the remaining tasks is required for TCP/IP software to operate, they are necessary for making the network more friendly and useful. In the next two chapters, we look at how to configure basic TCP/IP network services. Perhaps the most important of these is name service.
It is, as the name implies, a servicespecifically, a service intended to make the network more user-friendly. Computers are perfectly happy with IP addresses, but people prefer names. The importance of name service is indicated by the amount of coverage it has in this book. Chapter 3 discusses why name service is needed; this chapter covers how it is configured; and Appendix C covers the details of the name server configuration commands. This chapter provides sufficient information to show you how to configure the BIND software to run on your system. But if you want to know more about why something is done or details on how to do it, don't hesitate to refer to Chapter 3 and Appendix C.
 BIND 8 is the version of domain name software that comes with most versions of Linux and with Solaris 8. A newer version of DNS softwareBIND 9is also available. BIND 8 and BIND 9 use essentially the same configuration file syntax. The examples presented here should work with both BIND 8 and BIND 9.