planet syn2cat

May 15, 2013

adamas.AI

Le Festplattencrash

Moinsen!
Leider gab es gestern einen Festplattencrash aufm Server. Die hälfte ging irgendwie noch (wie Webserver) aber der Rest war irgendwie im Arsch. Nach nem remote enforced reboot blieb die Kiste dann hängen (bis dahin wusste ich nicht, dass die Festplatte im Arsch war). Tja der Support war so nett und hat mir dann die Backup Festplatte reingeschoben. RAID FTW kann ich da nur sagen.

serverhumping

Dies hat nun aber die Konsequenz, dass die ejabberd DB (Jabber daemon) dennoch futsch war. Und wer schonmal ejabberd laufen hatte weiss, dass das niiiiiiiiiiie mehr fixxbar ist^^ Die sehr spartanischen ejabberd Logs (auch im DEBUG modus) helfen einem da gar nix. Die erlang crash logs dagegen sind total unlesbar und bloated. So oder so, ist das nix für mich. Ich hab mich nun also für Prosody als Jabber daemon entschieden. Klein, fein, sparsam und schnell. Genau das was ich brauche.
Für alle die einen Jabber account bei mir hatten, bitte melden damit ich euren User wieder anlegen kann!

MfG virii

May 15, 2013 10:37 PM

May 14, 2013

Slopjongs weblog

VirtualBox: Make your virtual machine accessible from your host system but not from the local network

With VirtualBox, a virtualization software package developed by Sun Microsystems, you run an operating system simultanously with the system that you have booted from. The operating system installed inside VirtualBox [...]

by slopjong at May 14, 2013 02:49 PM

May 12, 2013

Slopjongs weblog

The syn2cat hackerspace needs more space

The syn2cat hackerspace – a location in Luxembourg where geeks meet – is a container building made out of two containers which offers space to two associations. Each association has [...]

by slopjong at May 12, 2013 10:26 AM

May 11, 2013

World of a Geek

[Blogging] Monthly Obsessions: April

No idea where the time went but I still can’t believe that April is already over. Unfortunately, I didn’t have too much time to play,...

by fabi at May 11, 2013 08:46 PM

April 28, 2013

April 17, 2013

World of a Geek

[Blogging] Monthly Obsessions: March

After my Latest Obsessions article I wrote a while ago, I decided to make a little ‘monthly recap’ article of things I played, read, watched...

by fabi at April 17, 2013 04:45 PM

March 27, 2013

adamas.AI

Hacker umbringen geht in Ordnung!

Hi!
Nicht schlecht gestaunt habe ich bei diesem Artikel von The Verge. Darin steht unter anderem folgendes:
According to the manual's authors, it's acceptable to retaliate against cyberattacks with traditional weapons when a state can prove the attack lead to death or severe property damage. It also says that hackers who perpetrate attacks are legitimate targets for a counterstrike.

Im Klartext heisst das, dass es legitim ist Hacker zu töten (im Kriegsfall, aber wenns sein muss, dann wird einfach ein Krieg angezettelt um unliebsame Hacker los zu werden). Krasser scheiss. Stellt euch vor, morgen ist Krieg und ihr wollt eure Interessen mit euren Fähigkeiten verteidigen. Dann kommt von irgendwo ne Drohne her und kann euch einfach so über den Haufen ballern. Und nun stellt euch mal vor, ihr seid Sysadmin von nem KKW und durch son verfrühtes aufgezwungen Update fliegt euch fast ein Reaktor um die Ohren. Ihr habt ja nix gemacht aber man wird euch bestimmt als feindlichen Hacker Spion einstufen und dann werdet ihr abgemurkst.
Schöne neue Welt haben wir da...

MfG virii

March 27, 2013 04:45 PM

February 15, 2013

GRL

ASBL founding meeting

February 8, 2013

Following members attended the meeting :

  • GUTH Jan
  • HOFFMANN Michel
  • KESSELER Georges
  • TEUSCH Marc

All members were elected unanimously to be part of the organizational committee. Charges within the committee were distributed as follows :

  • TEUSCH Marc: president
  • HOFFMANN Michel : vice-president
  • KESSELER Georges : secretary
  • GUTH Jan : treasurer

The member fee was unanimously decided to be 120,00€ per whole year, payable on a yearly base. The committee withholds itself a certain flexibility to request the yearly fees from their members.

Next projects will include the commune of Esch/Alzette, where we will be featuring a lazortag workshop on “Vokanz doheem” during Summer 2013. More details will follow.

by macfreak109 at February 15, 2013 12:56 PM

ASBL Founded

On February 8, 2013, the Graffiti Research Lab finally became its proper non-profit organization (ASBL). The founding members created this association in order to be more visible to local authorities and to seek new opportunities.

At this moment, we want to thank our sponsors, syn2cat, who helped us become mature and evolve in an awesome environment. We’re looking forward to common projects in the future.

Should you want to join GRL, please mail us for more info.

GRL official logo

The new GRL logo

by macfreak109 at February 15, 2013 12:30 PM

February 09, 2013

syn2cat

Game evening

So hackers are computer nerds? Think again. We like to socialize, do creative things and build stuff. So what about games? Computer games do not always give that social aspect as with the classic board and card games. So some fellow syn2catters met last Thursday for a game night. The chosen game was Munchkin. An ...read more

by gunstick at February 09, 2013 09:29 PM

February 04, 2013

syn2cat

Quadrocopter factory

This Sunday we got serious about putting it all together: building our own mini quadcopters. Kenn gave some insights into the mathematics behind keeping an unstable system dynamically at rest. Same thing as balancing a broom on a fingertip, just that your head does not need to do a mathematical development over 27 pages to ...read more

by gunstick at February 04, 2013 11:42 AM

January 20, 2013

Prometheus

locale.py fails

[crayon-50fc5ed1df385/] If Moutain Lion should once disturb your work with such an issue, please have a look at the solution here. ;)

by prometheus at January 20, 2013 08:34 PM

January 16, 2013

the_metalgamer

Favorite musical scale

Nearly every musician has a favorite musical scale. Yngwie Malmsteen has the harmonic minor scale and Steve Vai has the lydian scale. Even I have a favorite musical scale, which is the bebop dominant scale, especially the D-BeBop dominant scale.

First of all, here is a table with all the notes, which are in the bebop dominant scale:

1 2 3 4 5 6 b7 7
A B C# D E F# G G#
A# C D D# F G G# A
B C# D# E F# G# A A#
C D E F G A A# B
C# D# F F# G# A# B C
D E F# G A B C C#
D# F G G# A# C C# D
E F# G# A B C# D D#
F G A A# C D D# E
F# G# A# B C# D# E F
G A B C D E F F#
G# A# C C# D# F F# G

So as you see, the bebop dominant scale is a octatonic, so with 8 notes, scale. It is basically a major scale with an minor seventh added. But you could also look at it like a mixolydian scale with an major seventh added.

As I play the guitar, the D bebop dominant scale is quite handy. I like it as I can play the wonderful powerchord progression G5 F#5 E5, but I also can play a C5. This is why I like the D bebop dominant scale. If you look at it, you see that you have two tritones in it. From 3 - b7 and from 4 - 7. So in the D bebop dominant scale: F# - C and G - C#, which is also quite handy for metal guitar players.

January 16, 2013 07:11 PM

January 15, 2013

the_metalgamer

Communication made complex

Communication is something, that everybody needs. But I don’t want to talk about the absurdity of language but about the complexity of the setup of my communication network. This is so, because I want to ensure my privacy. Also I want to use this on every machine I own, so I don’t have to go through the configuration process every time.

I’ve made an network diagram to explain it:

/img/Communication_Network.png

As you see, in this diagram I use 3 machines. First my desktop pc, named Evolution. Secondly, Darwin, my laptop, and Tortuga my raspberry pi, which is the server.

On the raspberry, I have ZNC, an IRC bouncer, and BitlBee, an XMPP to IRC gateway, running.

First of all, I configured BitlBee, to connect to my 4 XMPP servers. All these connection use SSL, to ensure my privacy, but I also use OTR on them to encrypt my messages. BitlBee also connect to Twitter and identi.ca via OAuth, but I don’t use them.

Then I’ve configured ZNC, to connect to 5 IRC servers, also via SSL. Even if the SSL connection to BitlBee is useless, but I thought why not?

Last but not least, I’ve configured Weechat to connect to my ZNC, also via SSL. I could optimize this by installing Weechat on my raspberry pi and then connect via SSH.

Well, there maybe some negative points in this setup. One is mainly, that I don’t have tested if file transfer over XMPP works. I know that BitlBee supports it, but I see the problem in this specific setup, as all of this is running on my server.

Another problem is, that I’m marked as online in XMPP, even if I’m not there, but I’ve used here a simple solution. ZNC is sending a automessage, if I’m not connected to it. Some people don’t like this behaviour, but I don’t bother.

See you soon, the_metalgamer

January 15, 2013 11:22 PM

December 29, 2012

Muling

29c3 Streamdumps

Letztes Jahr war leider der Server auf dem die Streamdumps liefen abgeraucht wegen Festplattenschaden. Also nicht DER Server, sondern nur meine kleine Maschine.   Damals noch in der Ukraine fand der Hoster dass die Festplatte ja noch gut sei, und dass die vielen kernel errors und das S.M.A.R.T. zu ignorieren seien. “It is okay, [...]

by muling at December 29, 2012 05:08 AM

November 04, 2012

Prometheus

An idea can live forever.

Independently of the man or the mask, the idea will never be forgotten. Even at times, where people or cyborgs will no longer be allowed...

by prometheus at November 04, 2012 11:00 PM

September 13, 2010

September 11, 2010

Geek @ Cooking

Rindfleisch Nudelwok

Rindfleisch nudelwok

Heute gibs mal was vom Chinesen! Warum? Irgendwie mag jeder den ich kenne Chinesisches Essen. Ist auch nicht verwerflich, denn es ist eine fantastische Küche mit richtig geilen Gewürzen und Saucen. Und da dachte ich mir, ich poste euch mal ein einfaches Rezept das ich zum Beispiel heute noch gemacht habe.

Was brauche ich?

  • Eiernudeln ( 250g )
  • Reisessig
  • Dunkle Sojasauce
  • Hoisin Sauce
  • Sambal Oelek
  • Nasi Goreng
  • Salz
  • Pfeffer
  • Rindfleisch ( 300g )
  • Zwiebel
  • Knoblauchzehe
  • Kokosmilch
  • Zucker ( brauner am besten )
  • Öl ( Maiskeimöl oder Rapsöl )

Wer es wagt dieses Rezept in einer herkömmlichen Pfanne zu kochen, der gehört gekreuzigt! Ihr nehmt nen Wok dafür!!!

Wir fangen damit an, dass wir unsere Zwiebel und die Knoblauchzehe klein hacken und erstmal bei Seite legen.

Dann erhitzen wir den Wok auf höchster Stufe und geben das Öl hinzu. Folgend werden die Zwiebeln und der Knoblauch in den Wok getan und glasig gebraten.

Währendem schneiden wir das Rindfleisch in kleine, mundgerechte Happen und würzen es nochmal mit Pfeffer und Salz. Nun stellen wir das erstmal bei Seite. Jetzt wird ein Topf mit Wasser erhitzt und die Eiernudeln kommen hinein, wenn das Wasser kocht. Vergesst nicht etwas Salz ins Wasser zu tun!

Wenn jetzt Zwiebel und Co glasig sind, kommt das Fleisch hinzu. Vergesst nicht immer gut zu rühren.

Nun haben wir Zeit für das Herzsstück des Gerichts! Wir nehmen eine kleine Schüssel und bereiten die Sosse vor. Dazu vermischen wir 4 EL Kokosmilch, 1 EL Reisessig, 1 EL Sojasauce, 1 TL Zucker sowie 1 TL Sambal Oelek und 1 EL Hoisin Sauce. Wenn nun das Fleisch angebräunt ist, geben wir die Sosse hinzu. Jetzt heisst es ständig umrühren!

Herkömmliche Eiernudeln müssten nach 4 Minuten fertig gekocht sein. Wenn dies der Fall ist, dann geben wir die Nudeln mit in den Wok und vermengen alles gut. Auf die Nudeln kommt je nach Geschmack etwas Nasi Goreng. Nun das Ganze noch 2-3 Minuten köcheln lassen. Danach vom Herd nehmen und servieren!

Guten Appetit!

Tipp:

 Das hier ist die absolute Basis version. Viel besser schmeckt es wenn man Frühlingszwiebeln nimmt und noch etwa 200 g Bohnensprossen. Wer mag kann sich noch ne Paprika klein schneiden und dazu geben!

September 11, 2010 06:14 PM

July 24, 2010

Dem Pit säi Blog

De-Anonymization

Ech war den Owend op dem Haxogreen an hunn do dem Virtrag iwwer d’Ewechhuelen vun der Anonymitéit am Internet “De-Anonymization – About loosing your anonymity through profiling” nogelauschtert. div.link a { color: green; } div.link a:visited { color: red; } div.link a:visited span.new{ display: none; } div.link a:visited span.visited{ display: inline !important; } Dëst huet [...]

by Pit at July 24, 2010 09:23 PM

June 07, 2010

Dem Pit säi Blog

Offiziell unerkannt Iwwersetzung vum WordPress K2

Ech hat jo schon eng Kéier d’WordPress K2 Theme op Lëtzebuergesch iwwersat, well dat awer wuel net all ze vill Leit matkréien, hunn ech beim Opruff no Iwwersetzungen, deen d’K2-Team viru kuerzem gestart huet, meng Iwwersetzung agereecht Déi aktuell stabil Versioun vum K2 ass 1.0.3, an fir dës Versioun ass och meng läscht Iwwersetzung. Soubal [...]

by Pit at June 07, 2010 08:27 PM

March 27, 2010

Tschew

An illustration depicting the state of affairs in our current understanding o...

3337_3358_400

An illustration depicting the state of affairs in our current understanding of particle physics. Time to explore the exotic lands!

March 27, 2010 07:11 PM

March 06, 2010

Kwisatz

HaxoGreen 2010 - A hacker's summercamp


After last year's initial success, the Luxembourgian Hackerspace syn2cat and the Chaos Computer Club Lëtzebuerg, once again organize a summer-camp for hackers and technology enthusiasts from Luxembourg and its surroundings.

HaxoGreen 2010, a pun on the leetspeak term 'h4x0r3d' will take place from July 22nd till July 25th in the southern town Dudelange in Luxembourg.

Whether you want to attend lectures and workshops, hack on your projects or just share 3 midsummer nights outdoors, socializing with other hackers, artists and geeks, HaxoGreen is the place to be. No need to be a 1337 H4X0r, we welcome all inquisitive people from around the globe.

Registration for HaxoGreen is open since February 23rd and early registration is highly recommended as there's only a limited number of tickets available. The camp is a comparatively small and cosy event that lives from its visitors participation. You may submit your lecture or workshop idea on the following or other topics at the camp's Participate! page:
  • Green IT and Green Hacks
  • Virtualized Environments
  • Cloud Computing
  • Darknets and Hackerspaces
  • Computer Security Incident Response and Mitigation
  • Do-it-yourself Science
  • Molecular Gastronomy
  • Wilderness Survival Tactics
  • Amateur Robotics
  • Radio and Mobile Communications (GNURadio, etc.)
  • Electronic Art (vj, dj, installations etc.)
  • Net Neutrality, Intellectual Property and Privacy Aspects
  • Active/Liquid Democracy and Political Activism
  • Sustainable Housing and eco-friendly Living
Hope to see you there!

by Kwisatz (noreply@blogger.com) at March 06, 2010 08:11 PM

December 21, 2009

Tschew

A zoom from the Himalayas to the microwave background and back compiled by th...

A zoom from the Himalayas to the microwave background and back compiled by the American Museum of Natural History from current data. It shows our place in the part of the universe we can see and the many galaxies in the neighbourhood that have been mapped. (note: the black cones are not due to some weird geometry, we simply haven't looked that way yet.)

Thanks to http://backreaction.blogspot.com/2009/12/from-distance.html for the tip.

December 21, 2009 02:30 PM

September 08, 2009

Kwisatz

What Inspiration can ArsElectronica09 be to a Hackerspace?



The 5:16pm train brought me back from Linz/Upper-Austria yesterday. It also brought some blisters, exhausted legs and an innumerable array of impressions from Ars Electronica 2009, some of which I'll try to relay in this blogpost.

I bought a daypass on Sunday, which might or might not have paid off, I'm not quite sure.. 33€ is quite a lot of money, especially when the train ticket already cost you a hundred bucks. To anyone going to Ars in 2010 I suggest to buy a festival pass, spend at least 3 days on the various exhibitions and talks and prepare yourself a schedule (because theirs clearly sucked).

Ars Electronica Center (AEC)
The labs
The Ars electronica center clearly has an abundant array of interesting stuff sitting around. With their Fab-, Brain-, and Bio-labs on the -3 floor, they touch a broad variety of subjects, from cyborgs via sensor-enhanced art to 3D printers and lasercutters. This is actually somewhat like MIT's Medialab in Boston, only that this is clearly more exhibition-focused and less a working space. And clearly a lot smaller.

The picture above is a web made of wire straps.


The sculpture in the above picture does actually sense when you go near it and it reacts by moving its various "body"-parts.

Knock! Music Program (by Novmichi Tosa)
The second floor actually has some cool hands-on stuff that you can't actually touch, which is sad. But anyway, the Knock music machine is a pretty cool concept of an semi-electric music instrument. There were several components to it, the picture below is just one of them.
I actually found a couple of youtube videos of the machine in action. I just hope you understand some japanese ;) (Another resource I found is Novmichi's sketchblog.)


loopScape (by Ryota Kuwakubo)
Another great thing on the second floor was obviously loopScape. In contrast to ordinary computer games, this is one where you actually have to move around the "screen", which is made out of leds. Steering your fighter-jet with a wireless controller, your goal is to shoot down the enemy's fighter. To get all of the action, you can't stand still but have to move around to actually see everything that is happening in this fast-paced game.



Quartet
Quartet is a huge machine that produces sounds from resonating wine-glasses and golf-balls being projected onto wooden xylophone bars. I hope I managed to capture some of that motion in my still.



Höhenrausch
Höhenrausch was an exhibition above the roofs of Linz. Walking on a wooden structure, you get from exhibit to exhibit while having a grandiose view over the city. You could even take a ride in a Ferris wheel.




One exhibit was really awesome! If you stood below the sprinklers with an umbrella, you'd hear 8-bit music as produced by the frequency of the water being released. The umbrella's tissue serves as a simple membrane and produces astonishingly clear sounds.





Cyberarts Festival
Tantalum Memorial - Residue (website)
Relay station for a social phone network used by the congolese diaspora in London.
And yes, though this thing is not your most recent asterisk pbx, it actually worked and was relaying calls for people on that network. From the project's website:

"'Tantalum Memorial' is a series of telephony-based memorials by the artists group Harwood, Wright, Yokokoji, to the people who have died as a result of the “coltan wars” in the Congo. The installation is constructed out of electromagnetic Strowger switches – the basis of the first automatic telephone exchange invented in 1888. The title of the work refers to the metal tantalum, an essential component of mobile phones"


Pursuit of the unheard
One of the things that kept me awake on Sunday evening was the "Höllenmaschine", one of the first, if not THE first synthesizer ever. Built by Bob Moog for Max Brand. As it says in the brochure: "The first wiring diagrams for the Max Brand synthesizer by Bob Moog are dated 1957."


On Monday morning, I decided to check out the MIT Impetus exhibition nonetheless, even though I thought I had already seen most of it in the Medialab itself.
And oh and I was so wrong!

littleBits (website)
Again, a little excerpt from their website:
"littleBits is an opensource library of discrete electronic components pre-assembled in tiny circuit boards. Just as Legos allow you to create complex structures with very little engineering knowledge, littleBits are simple, intuitive, space-sensitive blocks that make prototyping with sophisticated electronics a matter of snapping small magnets together. With a growing number of available modules, littleBits aims to move electronics from late stages of the design process to its earliest ones, and from the hands of experts, to those of artists, makers and designers."





Various impressions from Linz

One thing that I noticed already on Sunday were these "stencils". Only, it only came to me on Monday though that these weren't your ordinary stencils. What is so uncommon here is that the stencils are actually areas that are cleaner than the area around it. So what you see here is kind of a 'cleaner's graffiti'. (No, I'm in no way affiliated to Mazda or any other automobile manufacturer)



Finally, a last picture of the "Fassadenfestival":



A couple more pictures will be made available on my soup.
(All images contained herein are subject to the CC-BY-SA license.)

by Kwisatz (noreply@blogger.com) at September 08, 2009 10:39 AM

April 01, 2009

NYCResistor & U.S. Hackerspaces Featured on Wired.com

Dylan Tweney wrote a fantastic article on Wired.com about hackerspaces in the US. NYCResistor was profiled along with Hack DC and Noisebridge. A fun and interesting read…

While many movements begin in obscurity, hackers are unanimous about the birth of U.S. hacker spaces: August, 2007 when U.S. hackers Bre Pettis, Nicholas Farr, Mitch Altman and others visited Germany on a geeky field trip called Hackers on a Plane.

“It’s almost a Fight Club for nerds,” says Nick Bilton of his hacker space, NYC Resistor in Brooklyn, New York…

DIY Freaks Flock to ‘Hacker Spaces’ Worldwide, by Dylan Tweney

[Reposted from hackerspaces]

April 01, 2009 08:58 AM