Sams Teach Yourself TCP/IP in 24 Hours, Fourth Edition

Berkeley Remote Utilities

The Berkeley Systems Design (BSD) Unix implementation, known as BSD Unix, was a major step in Unix’s development. Many innovations that began with BSD Unix are now standard on other Unix systems and have been incorporated into other operating systems in the world of TCP/IP and the Internet.

One of the innovations of BSD Unix was a small set of command-line utilities designed to provide remote access. This set of utilities became known as the Berkeley r* utilities, because the name of each utility begins with an r for remote. Versions of the Berkeley r* utilities are still available for Unix, Linux, and Windows systems, although, like Telnet, these tools are now somewhat anachronistic in light of modern security concerns. ...