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TcL Scripting for Cisco IOS by - CCIE No. 7016 Arvind Durai, - CCIE No. 7050 Raymond Blair, John Lautmann

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Chapter 1. The Origin of Tcl

This chapter covers the following topics:

Tcl and Cisco IOS Software

Using Tcl Scripts in the Network

Tool Command Language (Tcl), invented in the late 1980s by John K. Ousterhout of the University of California, Berkeley, is a dynamic programming or scripting language, an interpreter, and a C library. Tcl helps users control other applications or utilities using basic flow control. Tcl is pronounced “tickle” or “tee-cee-ell.” One of the original suggestions for a title of this book was How to Tickle Your Router, which, although inappropriate, is quite descriptive.

Tcl is an interpreted programming language versus a compiled programming language. One advantage of an interpreted language is speed in the development ...

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