Exploring Expect : A Tcl-Based Toolkit for Automating Interactive Programs (Nutshell Handbook)

Written by the author of Expect, this book explains how this part of the UNIX toolbox can be used to automate TelNet, FTP, PASSWD, RLOGIN and other interactive applications. Based on TCL (tool control language), Expect lets the user automate interactive applications that have previously been extremely difficult to handle with any scripting language.