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Archives: December 2009

December 16, 2009

my name in Economic Times. :)

by viggy — Categories: experience, Fun — Tags: , , , Leave a comment

http://economictimes.indiatimes.com/infotech/internet/Post-online-CAT-disaster-IIMs-plan-to-switch-to-Foss-/articleshow/5338309.cms

Just in case they remove that article, copying the contents here. :). Thanks to Abrar for calling me an expert.

Online CAT may use open source code post glitch

15 Dec 2009, 1235 hrs IST, Peerzada Abrar, ET Bureau

BANGALORE: The leading IIMs, still smarting under the recent fiasco over the online CAT debut, are creating their own firewall against similar disasters in
future. After an elaborate post-mortem of the recent disaster, many IIM officials are exploring the idea of using free and open source software (Foss), rather than going in for proprietary software, to prevent online common admission test disasters in future.

“Online exams can be easily conducted using Foss as it can not only reduce costs by over 50%, but it is also safe against virus and malware attacks,” said one of the IIM officials. Infact, US-based Prometric — which bagged the high-profile $40-million contract to organise the online CAT using proprietary software like Microsoft Windows, along with NIIT — has pinned the main reason for this year’s disaster on the virus attacks.

Despite installing several security measures, they were unable to circumvent the virus attacks, which impacted over 20,000 candidates. Unlike the open source software, proprietary software is not for free and has to be bought.

Experts like T Vignesh Prabhu, a hacker at ‘deeprootlinux’, which is dedicated to developing and supporting Foss, said virus attacks form the major concern of IIMs. “The only solution is to discard the virus-prone operating system you have been using and install Foss, such as GNU (a free software) and Linux-based operating systems,” he said.

Foss software, which grants users the right to study, change, and improve its design through its source code, is the most preferred option. He said, there is enough statistics to prove that GNU/Linux-based operating systems are less prone to virus attacks. The only other way is to keep fighting the viruses by installing the latest updates of various anti-virus softwares.“And, you have to keep your fingers crossed hoping that developers of anti-virus companies are just as fast as the virus-writers,” he added.

Officials at Prometric, which had used proprietary software this time, said many centres were affected by mainly two viruses — Conflicker and W32.NIMDA. IIM officials said this happened despite the fire-walls systems installed. They said the CAT computers were sourced and leased from local colleges in the cities where the examinations were held. They said most of the CAT computers got infected through the servers and other computers in various colleges through the local area network (which is a computer network covering a small physical area like a group of buildings). Also, the existing data on some of the 17,000-20,000 CAT work stations has not been deleted.

IIM officials said many of these 17,000-20,000 computers were prone to virus attacks as they may not have used the genuine proprietary software.

“I doubt whether Prometric really checked this. Many colleges may have used pirated software,” said one of the IIM officials. The Foss model is already working successfully in states like Kerala, where the state government’s IT@School provides IT-enabled education to 1.6 million students a year in the state using Foss. “We will use Foss to handle over four lakh admission application forms in a period of 10-15 days for two lakh 11th standard seats in government and government-aided institutions,” said IT@ School executive director K Anvar Sadath. He said the CAT exam can be run successfully on Foss without any virus threats.

Despite all these advantages, some IIM officials also said it will be difficult to conduct exams like CAT on Foss as it is not user-friendly and there is very less awareness about it.

Meanwhile, top IIM officials said they are determined to continue to hold the CAT exam according to the online format, and not go back to traditional paper-pencil one. “Online tests take place globally on a large scale. IT-enabled education is the way ahead,” IIMB director Pankaj Chandra told ET on Wednesday. He said they are reviewing student grievances and are coming up with new guidelines to screen those who deserve to be given a retest to ensure that only genuine candidates enter IIMs.

IIM officials said they were reviewing thousands of hours of video recording of the entire CAT 2009 exam to screen such candidates. Infact, European Union is one of the biggest supporters of Foss at present, having shifted all its public administration details to the Foss format.

Japan aims to switch some of its government computers to the free Linux operating system and reduce its dependence on Microsoft Windows. Japan saw the use of Linux as a way of lowering procurement costs and bolstering its defence against cyber-attacks. Like Germany, France and other European countries, Japan, South Korea and China long have been wary of leaving too many government computers and networks dependent on Windows. Many experts view Windows as too prone to computer viruses and hacking.

December 11, 2009

rm -rf *

by viggy — Categories: debian, linux, tech — Tags: , , Leave a comment

I just got an idea of trying out the command rm -rf * in a virtual system. I had thought of creating a new domU in xen server in the office and then testing in it. However I just tried to switch on my Desktop which had been shut since last week due to some problem with my HDD. Strangely when I started the desktop, the BIOS detected my HDD and it booted into ubuntu. Now this made my expiriment lot more easier because now all I had to do was take a backup of the VM image and then boot using the image in qemu.

After booting up I started a screen and tried the command
rm -rf /
I got an error saying that “/” could not be deleted.

Then I tried the command
cd /; rm -rf *

and then it started deleting all the files in my filesystem. I went to another screen and tried the command “ls”. It told me that “ls” command not found. Then I tried various commands, but none of them worked, except echo and cd. I dont know why these didnt get deleted.

At last I was left with following file structure:
notice:/# cd
dev/ home/ lib/ proc/ .rnd sys/ var/

When I just press Tab twice, I get the following output:

notice:/#
: } case continue elif export getopts kill popd select then ulimit
! alias cd declare else false hash l printf set time umask
./ bg cdcgi dirs enable fc help let pushd shift times unalias
[ bind cdtmpl disown esac fg history ll pwd shopt trap unset
[[ break command do eval fi if local read source true until
]] builtin compgen done exec for in logout readonly suspend type wait
{ caller complete echo exit function jobs ls return test typeset while

Though this would be a very stupid thing to do in any circumstances, I didnt loose anything as I was just testing it on a VM. However the importent question still remains that is there any way to recover fmo here?

December 9, 2009

pushd and popd commands

by viggy — Categories: linux, tech — Tags: , , , Leave a comment

Suppose you are presently working some directory and for some reason you need to cd into some other directory for some trivial but urgent work. So how do you remember which directory you were in. This is where pushd and popd commands are used.
Pushd command adds a directory to the top of the directory stack, or rotates the stack, making the new top of the stack the current working directory. With no arguments, exchanges the top two directories and returns 0, unless the directory stack is empty.
sumit@sumit-Desktop:/var/www/cgi-bin$ pushd /usr/share/apps
/usr/share/apps /var/www/cgi-bin
sumit@sumit-Desktop:/usr/share/apps$

and popd command removes entries from the directory stack. With no arguments, removes the top directory from the stack, and performs a cd to the new top directory.
sumit@sumit-Desktop:/usr/share/apps$ popd
/var/www/cgi-bin
sumit@sumit-Desktop:/var/www/cgi-bin$

I hope it is useful. Definitely very useful for me.

December 7, 2009

svn commit error

by viggy — Categories: tech — Tags: , , , Leave a comment

I wanted to commit to a repository but whenever i tried the “svn commit” command. I was getting the following error.
svn: Server sent unexpected return value (500 Internal Server Error) in response to MKACTIVITY request for’ ‘
Well I did not understand what the error was till i checked the svn info.
The error was because I had checked out the code using http protocol and hence I had not been authorized to commit. So what I did was checkout the code again using https protocol.
However my senior told me that the right way is to do “svn switch”.

svn switch NEW_URL

December 3, 2009

my day, 3rd dec 2009

by viggy — Categories: experience, FunLeave a comment

got up at 11. went to bank and lodged complaints about my card transfer. while lodging complaint a guy shouts at the bank manager for causing him inconvinience for withdrawing money which was a pretty huge amount about 75k. then went to FOSS.IN and attended talk by debayan. It was a good one and at last I got to know properly what he was working on. Also got my hand on the OLPC laptop, which was very cute. Tried to use it for sometime. Interface was good and would like to get one of it myself someday but it seems that you just cannot buy one. Then went to the KDE Potd hoping to get a kde sweat shirt. Unfortunaetly couldnt get one. :(. Then left in middle of the daily keynote as I had to go to my old room and pay the monthly rent. Then had dinner with my old roomies. Then caught a bus to Shivajinagar to go back home. While reading the novel on the bus, one man apparently indian origin but a US returned( as I guess from his accent) advised me not to read novels while moving on bus as it harms the eyes. I asked him how else I could utilize my precious time while travelling. He couldnt suggest anything. However this has left me with thinking for an idea how to utilize thier time while travelling on bus. FM is not an answer as nowadays it is more crap than songs and it is not productive anyways. Now I am sitting in a cyber cafe. Came to apply in Cisco which I could only using IE 6 or 7. But the webpage is complete crap and it is hosted by merittrac. It does not even load in IE6 properly. Anyways I will have to try somewhere else I guess now. Now I think I will leave for my room. Hope to have fun tomorrow at FOSS.IN.

December 1, 2009

Get all your Gmail Contacts in Thunderbird Address Book

by viggy — Categories: tech — Tags: , , , , Leave a comment

Thanks to this post, I found a addon of thunderbird which synchronizes all your contacts of gmail with thunderbird address book.

Here is the link for the addon

https://addons.mozilla.org/en-US/thunderbird/addon/7307