Monday, November 28, 2016 •
Recently I thought, isn’t there a simple, cheap oscilloscope available? And there is: A do-it-yourself kit, all parts included, ready for you to solder. Elektor provides the DSO-068 complete with casing.
Sunday, October 30, 2016 •
Here are some commandline calls for libav avconv in order to convert a video file into the various needed formats to be included as a html5 video via the video tag.
Monday, September 26, 2016 •
Getting DisplayLink to work on a fresh installed Debian testing took more time than expected. One reason for this was for sure my lack of knowledge about the output providers infrastructure in xrandr. I was coming from an Ubuntu 14.04 system, where DisplayLink was working more or less stable. After upgrade to Ubuntu 16.04 it still was working, but the internal sound card of my system wasn’t - and sometimes the soundcard of my docking station only was working after a replug. That was the situation, where I thought: A reinstall of the system would be great - and I simply choose Debian, it usually works.
Monday, August 29, 2016 •
If you want to use public key encryption, you’ll need public and private keys in some format. OpenSSL and many other tools can generate such key pairs as well as java. However, if it comes to interoperability between these tools, you’ll need to be a bit careful. This post shows, how to generate a key pair with openssl, store it in files and load these key pairs in Java for usage.
Tuesday, July 26, 2016 •
A backup strategy is important. It’s like an insurance - you have it but you hope, you won’t need it. A backup not only helps in case your hardware is broken, it might also help, if you’ve accidently deleted some important files. One simple step towards a backup is using a external hard drive, that you can attach to your computer and then copy the data you want to backup. However, if you don’t take care, you either have always only one version of your backup, which means you can’t restore deleted files. Or you end up in having multiple copies of the same files which occupy the available space very quick. And, of course, copying all the files always again will take lots of time.
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