An Introduction to GraphViz
Using dot, twopi and NEATO to create graphics is not difficult. The three utilities were made according to the UNIX philosophy: they are easy to use, they do one thing well and the only requirement for using them is a simple text editor.
Graphical tools that make use of dot, twopi and NEATO languages for making graphs exist as well, but I still prefer the command line. The presented tools can be used for simple graphs as well as for complex graphs.
I would like to thank Nikos Platis for proofreading the article.
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Mihalis Tsoukalos lives in Greece with his wife, Eugenia, and works as a high school teacher. Previously, he worked as a UNIX systems administrator, an Oracle DBA, a UNIX programmer and a PL/SQL programmer. He holds a B.Sc. in Mathematics and a M.Sc. in Information Technology from University College, London. Mihalis can be reached at email@example.com.