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Author(s): Jon "maddog" Hall In Latin America, there are many students who qualify for free college tuition but dont attend a university because they cant afford the living expenses. To bridge that gap, maddog has been working on a new pilot program designed to help students with computer skills. About 15 years ago, a student in Brazil asked at a conference: "How can I make money with free software?" Of course there are many ways to make money with free software, but if you add open...

Use Gnuplot with command-line utilities. Some excellent charting and plotting packages can be found, but if youre like me, you sometimes just want to do a quick dynamic test plot without a lot of custom setup. Gnuplot is a command-line charting utility that has been around for a while, and I was amazed how easy it was to get up and running. In only 20 lines of scripting code, I was able to create real-time line and bar charts. In this article, I introduce Gnuplot with two dynamic examples: The ...