Using DisplayLink with Dell D3100 dock and Intel Sky Lake Graphics card on Debian
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.
Using openssl and java for RSA keys
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.
RSync Backup Script for Windows
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.
Simple Graphics Generator
Sunday, June 26, 2016
Do you know this? If you are bored you start scribbling around on a sheet of paper.
Now I was wondering, how it could look like, if a computer program would do the same…
Simple dummy Mail Server for development
Monday, May 30, 2016
Every now and then, you come across developing an application, that sends email. How to
simple test this application? It’s easy, if you have an own mail server. For Windows,
there is the very simple smtp4dev application, that listens on
localhost port 25 and displays all emails that would have been transmitted. A similar but cross-platform tool
is FakeSMTP. For a server, fakemail
might be worth a look at.