Archive for the 'Tech' Category

Something new on the net: www.dafferianto.info

My official personal website is up today. Its initial purpose was to provide information about me and my activities, and thus, it is expected to be very static. However, this site is open to new roles in the future.

The website can be accessed at www.dafferianto.info.

Everyone is welcome to make a visit.

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RWTH-Aachen’s eduroam on Fedora 10

The story began when I came to Aachen from Trento and needed the internet connection around the campus. I tried to use the “eduroam” SSID, but since it didn’t work, I used the “mops” instead. To get the connection, I needed to use the Cisco VPN client. So it all went well, I could connect to the internet at the university. But then, last month, when I discussed my thesis thingy with my supervisor, I couldn’t get my laptop online. I tried the normal procedure for connecting to the VPN server but with no positive result 😦 as shown below.

mops-ssidConnected to the “mops” SSID

mops-vpnCouldn’t connect to the VPN server (previously it worked fine this way)

Getting a bit frustrated, I contacted the RZ helpdesk through email, and the operator said “mops” was not available anymore! (except for guest users) Goshhh…. So the only choice was to use the “eduroam” SSID. I tried following the instructions at RZ’s website with no luck (I tried installing all 3 certificates required). I went to the RZ helpdesk at the SuperC building, but they couldn’t support the Linux platform 😦 So I went to the center for computing and communication’s helpdesk, but they couldn’t support the Linux platform as well. So they routed me to the informatics building, the usual place for me to hang out (the computer pool room). And finally the guy showed me how to configure things appropriately on newer Linux distributions. He used the Ubuntu 9.04 Linux distribution, but this specific configuration should work for Ubuntu 8.10 as well. I tried it on my Fedora 10 box and it worked just fine. Surprisingly, the guy wasn’t a computer science student. So what’s the special configuration? It is without using the CA certificate!!!! Gosshhhh… Had I known this earlier, I wouldn’t have had to be routed around Aachen 😀 Of course I used the NetworkManager provided by the Fedora 10 distribution instead of using the old-school network service (the /etc/sysconfig/network-scripts/ thingy). I will never use the traditional iwlist, iwconfig, and dhclient tools anymore unless in specific circumstances where I’m forced to use them 🙂

wpa-enabled-editedUsing the nm-tool make sure that WPA2 or WPA is supported by the wireless interface

eduroam-configThe correct NetworkManager configuration

My new laptop: Dafferianus [VAIOus]

My LaptopsOn Saturday, 24th November 2007, I bought my new laptop: a SONY VAIO VGN-C2S/H at MediaMarkt Köln. This laptop is meant to replace the old ‘[Johnny] Travelmate’, an ACER Travelmate 2355 NXCi. I decided to name it ‘Dafferianus [VAIOus]’. I picked this name because I used the Erasmus Mundus scholarship money to buy it 🙂 I was inspired by one of Indonesian PhD students living in Bonn who several weeks ago bought a digital camera and called it a ‘DAAD camera’ since he used the scholarship money from DAAD to buy it. So I also related my laptop’s name with Erasmus Mundus => ‘Dafferianus [VAIOus]’ 😀 Below is the picture of both ‘[Jhonny] Travelmate’ & ‘Dafferianus [VAIOus]’.

My Laptops

‘[Jhonny] Travelmate’ & ‘Dafferianus [VAIOus]’

My main reason for buying a new laptop was the need of more processing power to cope with my daily activities which almost always involves my laptop. Sure Jhonny had done a very good job in assisting me until today. Help me through the working days at PT. PSN, final bachelor project, searching & applying scholarships. But however, I must admit that Jhonny uses Intel Celeron M as its processor and it can’t handle stuffs well now. When I was back in Yogyakarta, my dorm didn’t have internet connection, and I had another desktop PC. I used Jhonny only for running a word processor, spreadsheet, implementing some *nix goodies, and a bit of programming. At the office I load-balanced my tasks with the office’s desktop PC. But now, everything should be done in a single box. Since my room is connected to the internet, now I use a word processor, spreadsheet program, music playing, browsing with several tabs, opening 3 instant messenger applications, and running a development application at once. Jhonny seems exhausted doing these things 😦 I hope VAIOus can handle them. So far it works well 🙂 Actually VAIOus doesn’t use the most current tech out there. In fact, it’s a bit old in tech term. It uses Intel Core 2 Duo T5500 1.66 Ghz, 1GB RAM, and built-in Intel Graphics Media Accelerator 950. But I chose it, since the price/performance was fine, and it’s 13.3″ (well less than 14″) 🙂

The story began several weeks ago. After deciding to buy a new laptop, I made a constraint that the laptop’s screen size should be < 14″. So I went to H&G and Galeria Kaufhoff at the city center of Bonn to compare the prices. I also checked http://www.notebooksbilliger.de , and found out that the average price was > 1000 € except for Acer and Fujitsu Siemens. But however, almost all of my friends and even sales persons at the computer shops didn’t recommend Acer laptops. I dunno why, since Jhonny did all its tasks well back then. So I was targeting one of Fujitsu Siemens’ 12″ Amilo series. But then I found out from H&G that the warranty of Fujitsu Siemens products sold in Germany aren’t valid outside Germany 😦 Then on Friday, 23rd November, I went to MediaMarkt Köln with Vina & Eddy. And there I found the offer of VAIOus for 849 €. But the drawback was that it’s the last piece available at MediaMarkt and on display. So I decided not to take it yet. The other day I checked Saturn in St. Augustin and ProMarkt in Bonn West. And I was really shocked to see the same Sony Vaio product as in MediaMarkt Köln priced 1299 €. So, I decided to take the offer at MediaMarkt Köln and went to Köln the same day to buy it.

At first I found the product somehow stupid, since Sony didn’t give any installer CD/DVD inside the package (except the Windows anytime upgrade DVD), and VAIOus was bundled with a Windows Vista Home Premium operating system in German language 😦 And the OEM license is only for that German Vista Home Premium….. Damn!!! So I downloaded an English version of cracked Vista Home Premium using torrent and installed it, coexisting with Fedora Core 7 soon after. I feel so sorry for using a cracked version of Vista Home Premium, but I think it’s not so bad since I have the German license 🙂 And besides, there’s no way of using Windows XP => NO DRIVERS!!!! Even at Sony’s support page!

At last I hope VAIOus will do its job well assisting me through my activities….