October 5, 2011

setup an encrypted directory on the sdcard in Android

Filed under: Android,Linux,Open Source,Security — Tags: , , , , , , — xiwen @ 10:41 am

Introduction

Recently I acquired an HTC HD2 smartphone. It is running Android from NAND. To be specific, the HD2_NDT_MIUI_GINGER_STABLE_V2.2_MAGLDR rom found at XDA. It is known Android isn’t quite secure in terms of physical access. It is inevitable to loose ones mobile device. When that happens we should rest assured the information on that device is not accessible by others.

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January 23, 2011

weather: simple command line weather script

Filed under: Linux,Open Source,Projects — Tags: , , , , , , , — xiwen @ 2:55 pm

In my quest to make my systems more useful I created a command line weather script. There are similar programs made already like weathercli, weather-util. But the first didn’t work at all. The second only supports USA states/cities. Not quite useful in my situation where I want weather conditions of The Hague in The Netherlands.

The result is a simple bash script that fetches xml data from Google Weather API using curl. This data is then parsed using xmlscarlet and awk.

View the final script

December 4, 2010

Awesome config and nagios graph scripts

Filed under: Linux,Open Source,Projects — Tags: , , , , , , — xiwen @ 6:50 pm

Recently I made my Awesome config, its related scripts and nagios performance data check scripts available to the public. Check them out at my Open source projects site.

December 2, 2010

Train Recurrent neural network using particle swarm optimizer

Filed under: LIACS,Linux,Open Source,Optimization,Projects,Research — xiwen @ 8:39 pm

In the project LIACS SWI 2010 a recurrent neural network is trained using a standard particle swarm optimizer. This trained NN is then used as the brain to drive a two-wheel truck in an on-dimensional world with obstacles.

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January 22, 2009

Recovering data from corrupted partitiontable

Filed under: Debian,Gentoo,Linux,Mac OS X — Tags: , , , , , , , , — xiwen @ 6:15 pm

The situation is very simple. It does not happen regularly, but if you do come across it you might find this post useful. Now quit the chit-chat. As the title already implies, my external HDD (harddrive), a Western Digital mybook 500GB with data ended up with a corrupted partitiontable.

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July 9, 2008

Debian as nxserver and OS X tiger with nxclient (freeNX)

Filed under: Debian,Linux,Mac OS X — Tags: , , , , , , , — xiwen @ 8:41 am

No Machines NX solution has been around for a while. It is an equivalent of RDP (remote desktop protocol in the MS windows world) which supports resumable sessions.  It opens the door the conventional X-protocol was not designed to operate on, which is efficient usage of bandwidth. (more…)

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