Awesome collection of software on Ubuntu

March 27, 2012 Leave a comment

Really love this blog

Categories: Reviews, Tutorials Tags: ,

Install Picasa 3 on Ubuntu

March 27, 2012 Leave a comment
I cannot see picasa in Ubuntu software repository, so here is how to install Picasa 3 from terminal:

sudo sh -c "echo 'deb testing non-free' >> /etc/apt/sources.list";
wget --quiet -O - | sudo apt-key add -
sudo apt-get update
sudo apt-get install picasa

Alternatively, you can download the file from Google download website

32-bit Ubuntu:
wget && sudo dpkg -i picasa_3.0-current_i386.deb

64-bit Ubuntu:
wget && sudo dpkg -i picasa_3.0-current_amd64.deb
Categories: iDo Tags: ,

MATLAB on Ubuntu: From Install, Make launching Icon,… to Uninstall

February 12, 2012 1 comment

Here are the steps to install MATLAB + some possible problems:

  1. Extract/mount the zipped/iso installer file. For me I extract the iso to /home/bot/Downloads/Software/ml2011bu
  2. Open the terminal (Ctrl+Alt+T), type sudo sh install
    1. You might run into the problem say:Preparing installation files …
      Installing …
      eval: 1: /tmp/mathworks_2931/sys/java/jre/glnx86/jre/bin/java: Permission denied
      bot@bot-laptop:~/Downloads/Software/ml2011bu$ cd sys

      What you need to do is to make the file “java” executable by
      from your installer folder, type

      cd sys/java/jre/glnx86/jre/bin/
      chmod +x java

      you will see that the file permission is changed from
      -rw-r–r– 1 bot bot  47308 2010-10-20 04:41 java
      drwx–x–x 4 bot bot    4096 2012-02-11 17:55 java

      Now go back to the installer folder and install it with sudo sh install, and it should work

    For more details on installation, please visit

Once the installation is finished, you may want to create a script to run the MATLAB. Here is how

  1. Go to desktop (where else is fine too)
  2. Create an empty document, let’s name it
  3. Open with gedit, and type the following
    cd /usr/share/matlabr2010a/bin/
    sudo sh matlab -desktop
  4. Open the terminal, go to desktop by typing in the terminal cd ~/Desktop
  5. make the script executable by typing in the terminal chmod +x
  6. Now you can run MATLAB by running the script by typing ./

Now, if you want to add a launching icon on the menu bar, here is how:

  1. Right click on the menu bar
  2. Edit menus>Go to Programming in the left panel
  3. Click new item and add all the information
  4. In the command, type /home/bot/Desktop/
  5. You can also change the icon by clicking at the icon on the top-left corner and choose where the icon is
    1. Here is an easy command line to download the icon
      sudo wget -O /usr/share/icons/matlab.png
    2. The icon will be downloaded to /usr/share/icons/matlab.png
  6. That’s it!

And, if you are bored with MATLAB and want to uninstall it, please follow the steps here

  1. Locate the matlab dir, mine is /usr/local/MATLAB
  2. Remove the matlab dir by
    >cd /usr/local
    >sudo rm -r MATLAB
  3. bye bye MATLAB, and you get 5GB more space hahahaha!
Categories: Tutorials Tags: ,

How to fix “sticky” wacom stylus click in Ubuntu 10.04

January 21, 2012 Leave a comment

The problem is described very well by stephanecharette “I don’t know when it started, but my Wacom stylus clicks haven’t been working right. It seems to do the “click down” correctly, but hasn’t always been doing the “click up” when I release the pressure on my stylus. This leads to a bunch of problems when Ubuntu thinks I’m holding down the mouse button, when in reality I’m not holding anything down.”  from

Although the post focuses on Ubuntu 10.10, but I think the solution is applicable to 10.04 too. It seems to me there are two solutions to solve the problem, which is posted by cnr_roxx:

  1. Compile a new driver for 10.04
  2. Upgrade to 10.10 and install 2 packages from Irie’s private repository, please see the post#5 in here

Somehow, I don’t want to upgrade to Ubuntu 10.10, so I will stick with the option 1, that is, to compile a new driver. The instruction is very well documented in

The URL links to another post, which seems to be more compact.

Just follow the steps; download, compile and install.

I also found an overview link to explain all these in just a few paragraph and it is pretty easy to follow.

For 64-bit Ubuntu 10.04, I found this the following posts are the best:

  1. The last paragraph of post#14
  2. Which links to PartIII of the post
  3. Bug report website is very helpful
  4. Setup pressure support in GIMP


[Solved] The following works!

Here is the summary on how to solve the problem from Just read the PART III “III. Configure the Wacom Bamboo P&T tablet“, and follow the instruction.

  1. type in the terminal
    gksudo gedit /usr/lib/X11/xorg.conf.d/10-wacom.conf
  2. Copy the following content to the file 10-wacom.conf and save the file
    Section "InputClass"
    	Identifier "Wacom class"
    # WALTOP needs a patched kernel driver, that isn't in mainline lk yet,
    # so for now just let it fall through and be picked up by evdev instead.
    #	MatchProduct "Wacom|WACOM|WALTOP|Hanwang"
    	MatchProduct "Wacom|WACOM|Hanwang"
    	MatchDevicePath "/dev/input/event*"
    	Driver "wacom"
    Section "InputClass"
    	Identifier "Wacom serial class"
    	MatchProduct "Serial Wacom Tablet"
    	Driver "wacom"
    #	Option "ForceDevice" "ISDV4"  # deprecated starting with
    #        xf86-input-wacom-0.10.8
    Section "InputClass"
            Identifier "Wacom serial class identifiers"
            MatchProduct "WACf|FUJ02e5|FUJ02e7|FUJ02e9"
            Driver "wacom"
    # N-Trig Duosense Electromagnetic Digitizer
    Section "InputClass"
    	Identifier "Wacom N-Trig class"
    	MatchProduct "HID 1b96:0001|N-Trig Pen"
    	MatchDevicePath "/dev/input/event*"
    	Driver "wacom"
    	Option "Button2" "3"
  3. close the file, reboot the machine, and it will work.


Categories: iDo, Tutorials Tags:

Install Bamboo Wacom on Ubuntu

January 19, 2012 Leave a comment

I collect a few useful links:

A simple way to get the Bamboo tablet work on Ubuntu 10.04

The pressure problem

Full document including every detail of Bamboo tablet on Ubuntu

Categories: Tutorials

How to Install Eclipse and Android SDK on Ubuntu 10.04 LTS

January 17, 2012 1 comment

Before walking you through the installation process in details, it’s good to know a big picture:

  1. Since Android development needs Java, so we are going to need Java installed on Ubuntu
    • If you are using 64-bit Linux machine (e.g. 64-bit Ubuntu), you may need to install ia32-libs.
  2. You will also need Java Development Tools (JDK), and Eclipse is recommended
  3. The last thing is to install Android Development Tools (ADT) on Eclipse

All the information regarding the installation can be found at the Android developer website

Here is the installation in details:

  1. Install Java
    1. If you are using 64-bit Ubuntu, you will need to install ia32-libs package:
      sudo apt-get ia32-libs
    2. Next, install Javasudo apt-get install sun-java6-jdk

      A tricky part is that when the Java installation almost done, you will need to click <Ok>, which can be done by click in the terminal and press Tab until the <Ok> is highlighted.

  2. Next, you will need to install Java Development Tools (JDK). Eclipse is recommended because there is an Android Development Tools (ADT) plugin available.
    1. Go to
    2. I download Eclipse IDE for Java Developers (both 32- and 64-bit are available)
    3. Extract the downloaded file eclipse-java-indigo-SR1-linux-gtk-x86_64.tar.gz, and you will get the folder called eclipse, containing all necessary files
    4. Since Eclipse is built to be portable, you can move the extracted eclipse folder to any location you want. It is recommended to move the file to your home directory /home/yourusername/
    5. You might want to add the launch icon on the menu, please follow the process here.
  3. Launch Eclipse, we will now install the ADT plugin
    1. go to Help>Install New Software..
    2. According to the ADT plugin page, we will put the URL
      and click Add
    3. Tick the newly added plugin, and click Next until done
  4. Next, we will install Android software development kit (Android SDK)
    1. Download the Android SDK from
      For (both 32- and 64-bit) Ubuntu, you will download android-sdk_r16-linux.tgz
    2. Extract android-sdk_r16-linux.tgz in the home folder (/home/yourusername/)
    3. The extracted folder is android-sdk-linux
    4. Now go back to Windows>Preferences
    5. On the left panel, click Android
    6. In the SDK Location, select your extracted SDK location, which is
    7. Click Apply and OK, wait a few minutes for the program to update
  5. Retrieve all necessary files for SDK
    1. Go to Window>Android SDK Manager
    2. Tick all the Android versions that apply, and click Install packages
  6. Done, So now you may proceed to build a new project!!!

Additional reading can be found from

Design Indaba as a Good Resource for Data Visualization

January 15, 2012 Leave a comment

I came across the website Indaba Design (, a website/blog showcasing hundreds of interesting design. The things that interest me most about this website are approaches people proposed to visualize complex data and novel ideas to represent data in more aesthetic way.

Since I’m now working on functional MRI (fMRI) for brain image, I’m interested in how we can visualize time series of 3D brain fMRI data, which you can think of as 3D video of brain. As of now, I found that visualize such data on monitor is not very convenient, and “Shadowless“, an interesting work of Makoto Tojiki, sparks me some ideas to present the 4D video.

Another favorite work is the integrated public transportation map by Henning and Williams, where the complex routes are represented in much simpler and more aesthetic way.

Categories: Entertainment, iDea Tags: ,