This summer I’m teaching a graduate class, Principles of UNIX, which is more or less a crash course in the Mother of All Operating Systems. One of our early topics is email on UNIX, in which I try to impart to the class just how transformative email was back in the day. For early Internet [...]

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For most of this year I’ve been working on a new product called Cisco OnPlus, a network management service for small business. In order to do its job effectively, OnPlus needs to know what devices are present on the network, and one of the key tools we use to accomplish this is DNS Service Discovery. [...]

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In my last post I showed a particularly easy way to to set up an SMTP server so postfix could send mail from your Linux system. In this post I’m going to add a few tips that might help you get through some rough spots in the whole process.

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