Expect is a Unix/Linux extension for the Tcl scripting language. It was designed as an automation and testing tool and it makes it trivial to interact with complex programs, such as remote shells, security maintenance. It has particularly powerful response recognition.

Expect adds many extensions to the Tcl scripting language which simplify scripting interactive applications controlling such hard-to-interact programs such as telnet, ftp, passwd, fsck, rlogin, tip, ssh, and others. Expect/tcl can run a GUI interface or run from the command line. Since Tcl is a full featured programming language, Expect can easily interact with databases, webservers, etc. with intuitive, powerful, and easy-to-anticipate processing.

Expect is in the public domain. There is full support for Linux and Windows.

Overview and history website: http://www.nist.gov/el/msid/expect.cfm
Support and download website: http://expect.sourceforge.net/
FAQs website: http://expect.sourceforge.net/FAQ.html

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