Linux

The paper according to the DX article of symmetric mail cryptography is finally done. You may download the (German) paper here.

USBAuth has grown very fast, thank all users for reports, testing and feedback. I've put a lot of security-concerned stuff into the code, which makes USBAuth quite secure and ready for every-day use. The documentation, as well as the source and a Debian package of release 0.3 can be obtained from the USBAuth project site.

Syslogd is the friend of all administrators. No serious admin would miss taking a look in /var/log/* consistantly. Reading and working out log files is a very time consuming process, and even more complicated when administrating multiple server boxes.

This mini-howto shows you how to centralize your logs.

Delta Xi now runs a subversion server. Please note that the published source codes are mostly proof-of-concept implementations, not real projects.


Everything is commonly public domain and GPLed, except for SMC (this one will be licensed under GPL in a few months). The web-interface can be accessed via the WebSVN interface. Enjoy!

You're sitting in front of your box, but the screensaver is on because
you're not actually working on it (even admins show the need for
non-unix human requirements). In that case, just code your own keyboard
LED handling routine, and let you what's going on on your system.

"Grand challenge" defines problems which are, at least theoretically, solvable with todays computational capacities - but not in a reasonable amount of time. Therefore, massivly paralleled processor systems are used to compute how atomic bombs distribute particles and get the weather forcast for tomorrow (and the day after tomorrow, and the day after the day after ...).

Programs are normally not SMP capable by dafault, you have to tell the program which processor has to do which work. The main challenges in this programming style are briefly shown here.

Who needs graphical instant messaging?
Shelladdicted users prick up your ears - get rid of GUI IMs and let an FPS-like console do the work for you.

Installing Linux on a laptop with getting all features to work isn't always a bed of roses. This howto will show you how to install and configurate a perfectly working Debian box, shown by example on a Sony Vaio TX3 notebook.

You think this code is ok?

int compare(int x, int y, int z) {
     if (x==0)
         return y;
     else
         return z;
 }

Of course it is, but isit the most efficient way to branch? Are you sure why the following code works?

     return y=!!x;

Get a few information about the almighty If-Statement...