Summary

This chapter described the networking capabilities provided by TCP/IP commands in UNIX. You saw how the Berkeley Remote Commands can be used for networking between UNIX System computers, including remote login, remote execution, and file transfer. The DARPA Commands, which can be used for networking in heterogeneous TCP/IP environments, were also introduced. The DARPA Commands can be used for remote login and file transfer between computers running different operating systems, as long as they run TCP/IP software. The Secure Shell, designed to eliminate the security problems of the Berkeley Remote Commands, was described. Protocols that can be used to set up TCP/IP connections over a telephone connection, PPP and PPPoE, were also discussed.

The capabilities covered in this chapter are part of the networking and communications facilities in UNIX that include the mail system, the UUCP system (discussed on the companion web site), and distributed file systems (discussed in Chapter 15). Administration, operation, and management of the TCP/IP Internet Package are discussed in Chapter 17.

You will learn more about the Internet and the wide variety of services available on the Internet in Chapter 10.