Tracking down a NoSuchMethodError

Caused by: java.lang.NoSuchMethodError: org.apache.xml.serializer.Encodings.isRecognizedEncoding(Ljava/lang/String;)Z
        at org.apache.xml.serializer.dom3.LSSerializerImpl.write(
        at ...

If you’ved ever had the unpleasant task of figuring out which of the 200+ JAR dependencies in your project that are causing the a NoSuchMethodError (usually in some XML or webservice code), then this is the trick for you: Continue reading

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Static fixed and wifi IPs on Raspberry Pi

When coding to and configuring ones Raspberry Pi, it is convenient to have it on a wired connection, but when it is being deployed in the field, it is much easier to have it on wifi.

Still, it can be immensely useful to have it’s IPs always be fixed, making surveillance etc a breeze (or more breezely, to be exact) and thus here’s a quick guide to making that happen. There are other tutorials on this, but most are about fixed IP for either eth0 or wlan0. Continue reading

Posted in Linux, Networking, Raspberry Pi | Leave a comment

A selection of handy unix/linux one-liners

Over the years I’ve found myself repeatedly using (variations of) the same one-liners to achieve certain tasks in unix/linux environments. Task such as finding files containing strings, finding sizes of directories etc.
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HOWTO: Get IPv6 in your home

Since IPv6 Day when I registered for a SixXS handle, I’ve wanted to jump on the IPv6 wagon at home. My setup is a DSL line with Telenor as my ISP. Almost needless to say, Telenor does not do native IPv6, so another route had to be taken – as noted above, SixXS seems a good choice, since they have made arrangements with several transit providers/colo’s/ISPs to provide PoP’s (point of presence) whereto mortal users, such as myself, can tunnel IPv6 traffic. Continue reading

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HOWTO: Time lapse with Contour HD GPS

(NOTE: This is a work in progress and mostly to remind myself of the process…)

When I started out experimenting with time lapse movies, I found there were surprisingly few ready-made open source or even commercial software packages that were simple to use, effective or even relevant for my relatively modest needs.

Of course there is QuickTime Pro and all the full blown movie editing packages, but being a geek I figured I could do better. Or at least cheaper :-)
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GWTP, Guice and Spring non-trivial beans

Having struggled a bit with the somewhat terse documentation and JavaDoc I finally figured out the tricks of using Guice and GWTP along with Spring. As much for my own future reference and for others that may have the same issues, here’s what I did.

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