Monday, April 27, 2009


MSC Malaysia Open Source Software Conference(MSCOSCONF2009) is an open source conference that will be held in Malaysia on 31 May - 3 June, 2009, organized by MAMPU and MDEC of Malaysia. There will be great speakers presenting their stuff on the event, great activities and much more. For further details, visit and

Tuesday, April 14, 2009

Installing virtualbox 2.2.0 on ubuntu 8.10

To install virtualbox is fairly easy. Just follow the instructions below:

1. Open /etc/apt/sources.list and add this line deb intrepid non-free

2. Import sun public-key and register it using apt-key (wget is for downloading, apt-key is for registering the key to your machine)
wget -q -O - | sudo apt-key add -

3. Update your system's package index file
$ sudo apt-get update

4. Install virtualbox 2.2
$ sudo apt-get install virtualbox-2.2

Done, that's all :)

Friday, April 10, 2009

Adding local directory to apt sources.list

I faced this problem when trying to install the latest version of lyx, frontend for the famous LaTeX/TeX document processor. Lyx is available at the ubuntu main repo, but the version is kind of outdated. After checking at, a latest version is available. After downloading the lyx and lyx-common package from here, I tried to install both of them using "dpkg -i *.deb" but they have unsatisfied dependencies. One of the way to solve this is to download all the dependencies and put them inside one directory, and run "dpkg -i *.deb" but I think I wanna try another solution which is using apt to install them. This is where "Adding local directory to apt sources.list" comes into the picture. The steps will be explained below:

1. Create the directory to put all the deb files you downloaded, in this case I'll create /home/foo/debs
$ mkdir /home/foo/debs

2. Put all the downloaded deb files into the directory
$ mv /home/foo/Desktop/*.deb /home/foo/debs

3. Check the current priorities and section for the package, find entry named Section and Priority:
$ dpkg --info lyx_1.6.2-1~getdeb1_i386.deb

Here are some of the info:
Package: lyx

Section: editors

Priority: optional


4. Create override file. Override file is used to override the default priority and section setting of the package (refer to no. 3 for guide on how to check section and priority). Override file contains 3 columns: package, priority, section. Package is the name of the package, priority is low, medium, high or optional and section is the section to which it belongs.
Example of override file content:

## Override
#Package priority section

lyx low editors

5. Create Packages.gz inside /home/foo/debs
$ cd /home/foo/debs
$ sudo dpkg-scanpackages . override | gzip -c9 > Packages.gz

6. If you are too lazy to do the override file, you do not have to. Just change the "dpkg --scanpackages" command above to this:
$ cd /home/foo/debs
$ sudo dpkg-scanpackages . /dev/null | gzip -c9 > Packages.gz
If you follow this path, ignore step 4 and 5

7. Add this line to /etc/apt/sources.list
deb file:///home/foo/debs /

8. Resynchronize the package index files from their sources
$ sudo apt-get update

9. Install your application (in this case, lyx)
$ sudo apt-get install lyx

Apt will fetch the deb files from your local file directory also. Congratulations, you just created a local file repository in your own computer :)