Nerds Only

Recovering Deleted files with Linux and Sleuthkit

Ever accidentally delete a file you really needed from the recycle bin? Ever format a disk and install a new operating system only to find later that you forgot to save off some really important files first? The former recently happened to us here at the Univeristy in Mzuzu... we thought doom was upon us until we stumbled upon a open (free to change, use, and distribute) software utility called Sleuthkit (http://www.sleuthkit.org).

When we realized our disaster, we started searching Google for "data recovery", "recover my files", etc. Listings appeared for companies charging hundreds of dollars for data recovery services and software. We tried some of the trial versions of the commercial software, but nothing was able to detect our files. Finally one of us here in the office in Mzuzu stumbled upon Sleuthkit, an amazing utility that was able to recover out deleted files from a formatted disk and didn't cost us a penny!


Further evidence of a dotcom boom in Malawi

Further evidence of a dotcom boom in Malawi... Last week the students of Mzuzu University went on strike because they felt that they had not been provided enough access to computers by campus administration. Unfortunately, (or fortunately depending upon how you look at it), Marissa and I were out of town at the time, in Tanzania. We have heard that the student strike was mostly peaceful. Students organized a sit-in and skipped classes. One of the days of the strike, however, things seem to have gotten a little out of hand. Students decided to burn old tires near the campus gate, so the police and some sort of weak tear gas became involved.


Categories:

VSAT Community Networks

I just read that the internet is growing faster in Africa than anywhere else in the world. Most of us here in Africa are connecting via satellite or VSAT connections which are a fairly expensive way to transmit data (though costs are rapidly dropping). While I am finding sufficient knowledge on how to purchase VSATs, I have found very little discussion or collaboration online concerning how best to maintain VSAT internet connections.

Just yesterday I received an email from a friend here in Malawi describing the experience of another friend who “successfully” installed a VSAT connection for their NGO. The NGO found that the the installers from the company they hired to install the VSAT “haven't got a clue [how to install a VSAT]. It took them over 10 days to get it running - basically they installed it and it didn't work and they couldn't work out why.” After asking help from a local internet cafe owner the NGO found “the VSAT company had supplied the wrong kind of network cable (not a cross over one) - a fairly basic mistake and they haven't apologised or anything - so we're not really very impressed.”


Professor Saints and the nutty open source textbook

I must apologize for the lack of content on the blog recently. Things have been busy in good ways... very good ways. I have been asked to teach the first ever introductory to computer science course here at Mzuzu University Department of Mathematics! Fortunately the course is only meeting twice a week, so there is plenty of time to piece together lessons and lectures. So far, the students seem to be enjoying themselves. They are very excited about having the chance to learn to program computers. Our only problem so far is that the number of computers on campus comes no where close to matching the students enthusiasm for the subject.


Differences between internet connectivity in Colorado and Malawi

Malawians, in general, are both very poor and very ambitious. I think this is why I am finding engineering in Malawi to be such exhilarating experience. So often here we are asked to do a lot with a little. Its forcing me to push the limits my creativity, my imagination, and my skills as an engineer.

I was in a meeting last week to discuss the redesign of the internet network architecture for Mzuzu University. There is a need to rethink how users are allowed to connect to the internet here in Mzuzu. Currently the network is designed much like the networks of the universities in the USA. In general, computers with connections allow users are to have unlimited access to the internet. A quick comparison of the internet connection here in Mzuzu to the last connection I used at my house in the USA will show why a different network architecture is necessary in Mzuzu:


One thousand roads and no highway...

Three days into our Malawi adventure and my head is full of questions. I think that I have pieced together a reasonable view of what the internet infrastructure looks like in Malawi through various meetings at the US embassy here in Lilongwe.

It seems that in Malawi, any government office, international organization or private company who wants to connect to the internet does so by buying their own VSAT satellites. Its essentially every person for themselves, as each organization takes their chunk of capital and builds their own personal pipeline.

Its as if a village of people wanted to travel to a distant city, instead of pooling resources to build a highway that would provide faster/more reliable/efficient transportation, the people each decided to carve their own individual narrow roads to the far away city. There is an unbelieved able amount of upkeep and investment costs associated with keeping these "individual roads" or fragmented internet oasises running.