Archive for the ‘linux’ Category

YoFrankie!, another good initiative for linux gaming.

Tuesday, July 20th, 2010

YoFrankie! is a game developed and funded by The Blender Foundation (and the community) in other to enhance Blender’s gaming capabilities; and design and implement new features. As a result of the development of this game, all the features developed within the project are now available in new versions of Blender, the 3D software.

It is very interesting the history behind the Blender project. I recommend you check it out. It is one (of many) success cases in Open Source development.

World Of Goo: an excellent game available for Linux

Friday, May 28th, 2010

World of Goo is an addictive, state-of-the-art, smooth and pleasant to the eye game. Plus, it is available for Linux natively!!! Plus it is only U$D20.-

Check it out here:

http://2dboy.com/games.php

I hope companies start believing there is a “Linux game market” out there waiting and wanting games to run natively.

How to remove .svn directories recursively

Saturday, April 10th, 2010

Just type this in your console:

rm -rf `find . -type d -name .svn`


Mic not working with C-Media soundcard and Ubuntu Karmic 9.10

Thursday, February 4th, 2010

The problem was that this on-board sound card is surround and, when in surround mode, the mic mini-plug input becomes Center /LFE output.

I fixed it this way:

1) Open “alsamixer”
2) Go to “Mic-In Mode” bar
3) Check that in “Item” (top-left corner), it reads “Mic-In Mode [Mic-In]”
4) If not (probably “Mic-In Mode [Center/LFE Output]“) hit up/down arrow keys until “Mic-In Mode [Mic-In]” is selected.
5) Check that mic is not muted. Go to “Mic” bar and check that it is not muted “Mic [Off]“. If it is, hit M key, you’ll get “Mic” only.

That should be it.

Bubble Translate: An excellent extension for Google Chrome

Thursday, December 10th, 2009

This extension provides of a really simple an elegant way of translating web pages to your language. It uses translate.google.com services to translate, and the way it does it is simply excellent!. Just keep Ctrl key pressed while selecting the text you want to translate and it will display the translation in a bubble in-line.

Also it provides a menu to select the translation of the entire web-page or to open a form (like the one in translate.google.com) for real-time translation.

Highly reccomendable.

You can found the extension here: https://chrome.google.com/extensions/detail/jlhlebbhengjlhmcjebbkambaekglhkf

And Google Chrome, here: http://www.google.com/chrome/

Installing ImageMagick from source in Ubuntu

Monday, December 7th, 2009
Start by removing any old versions previously installed via apt-get:
sudo apt-get remove imagemagick

Then update apt-get and install some supporting packages:

sudo apt-get update
sudo apt-get install libperl-dev gcc libjpeg62-dev libbz2-dev libtiff4-dev libwmf-dev libz-dev
libpng12-dev libx11-dev libxt-dev libxext-dev libxml2-dev libfreetype6-dev liblcms1-dev
libexif-dev perl libjasper-dev libltdl3-dev graphviz gs-gpl pkg-config

Use wget to grab the source from ImageMagick.org.

Once the source is downloaded, uncompress it:

cdtar xvfz ImageMagick.tar.gz

Now configure and make:

cd ImageMagick-6.5.0-0
./configure
sudo make
sudo make install

To avoid an error such as:

convert: error while loading shared libraries: libMagickCore.so.2: cannot open shared object file: No such file or directory

Add the following line to ~/.bashrc:

export LD_LIBRARY_PATH=/usr/local/lib
sudo ldconfig

You can confirm the install and available formats with:

identify -list format

Source: http://www.digitalsanctum.com/2009/03/18/installing-imagemagick-from-source-on-ubuntu-804/

Listening to Last.fm from Ubuntu

Wednesday, November 18th, 2009

A friend reccommended me Last.fm player for Ubuntu.

Simply run:

sudo apt-get install lastfm

That’s it, it works flawlessly and it consumes about 10-12KiB/s of your bandwitdh. Pretty cool, right? Now configure it with your last.fm account details and enjoy Last.fm Radios on your Linux box.

Non Relational DB: The (near?) future of databases.

Saturday, July 25th, 2009

Neo4j:

“Neo4j is a graph database. It is an embedded, disk-based, fully transactional Java persistence engine that stores data structured in graphs rather than in tables. A graph (mathematical lingo for a network) is a flexible data structure that allows a more agile and rapid style of development.
[...]
Neo4j has been in commercial development for 8 years and in production for over 5 years. It is a mature and robust graph database[...]
In addition, Neo4j includes the usual database features: ACID transactions, durable persistence, concurrency control, transaction recovery, and everything else you’d expect from an enterprise-strength database.[...]“

http://neo4j.org/

http://giladmanor.blogspot.com/2009/07/down-rabbits-hole-with-neo4j-part-1.html

mongoDB:

“MongoDB is a high-performance, open source, schema-free document-oriented database.[...]
When we describe MongoDB as “document oriented”, we mean it’s in the class of databases for which the primary storage unit is a collection – possibly structured – of data, most likely as key/value pairs.”

http://www.mongodb.org

Hypertable:

“Hypertable is an open source project based on published best practices and our own experience in solving large-scale data-intensive tasks. Our goal is to bring the benefits of new levels of both performance and scale to many data-driven businesses who are currently limited by previous-generation platforms.”

http://www.hypertable.org/

Dynamo:

“Unlike a relational database, Dynamo is a distributed storage system. Like a relational database it is stores information to be retrieved, but it does not break the data into tables. Instead all objects are stored and looked up via a key.”

http://www.allthingsdistributed.com/2007/10/amazons_dynamo.html
http://www.readwriteweb.com/archives/amazon_dynamo.php

Extra info:

http://www.computerworld.com/s/article/9135086/No_to_SQL_Anti_database_movement_gains_steam_?taxonomyId=173&pageNumber=1&taxonomyName=Databases

Enable "public_html" for users in Ubuntu for Apache2

Tuesday, July 14th, 2009

To enable the “public_html” folder for users in Ubuntu using Apache2, you only have to follow 3 steps. These are:

  1. Add the Apache2 userdir module: In Ubuntu, this functionality comes as a default module for Apache2. If you don’t have it enabled, just enter sudo a2enmod userdir in a console. This command will add and/or enable the module.
  2. Create the public_html directory: Create the public_html directory in the users home Enter mkdir /home/a_user/public_html in a console.
  3. Restart Apache2: restart Apache2 so that the changes take effect. Enter sudo /etc/init.d/apache2 force-reload in a console.

After Apache2 finishes restarting, you will be able to access the user’s public_html directory entering the address as follows in a web browser (I.E. Firefox :D) http://localhost/~a_user

Cheers

Subversion (SVN) with WebSVN, DAV and Apache2 under Ubuntu

Saturday, July 4th, 2009

Install Subversion:

Use the following command to install Subversion and the Apache2 module:

sudo apt-get install subversion libapache2-svn

Create a repository:

Use the following command to create a repository:

sudo svnadmin create /var/svn/new-project/

Add permission to the directory for the Apache user only:

chmod -R 775 /var/svn/new-project

chown -R www-data:www-data /var/svn/new-project

Configure Apache

Open /etc/apache2/mods-available/dav_svn.conf and add a new “virtual directory”:

<location /svn>
DAV svn

SVNParentPath /var/svn

AuthType Basic
AuthName "Subversion Repository"
AuthUserFile /etc/apache2/dav_svn.passwd

AuthzSVNAccessFile /etc/apache2/dav_svn.authz

Require valid-user

</location>

Create the users password file. Use the following command the first time only, the -c parameter will create AND override the file if it exists:

htpasswd2 -c /etc/apache2/dav_svn.passwd username

To add other users or change password use:

htpasswd2 -m /etc/apache2/dav_svn.passwd username

In /etc/apache2/dav_svn.authz, add the users permissions

[/]
me=rw

[new-project:/]
other.user=rw

Finally, restart Apache so that the changes take effect:

apache2ctl restart