Free Penguin

Using diff and patch

2007-10-16T21:27:00.000Z

I created here a small tutorial on using the GNU/Linux diff and patch tools for code developement projects using subversion.

VMWare and Xen Management with BixData

2006-11-17T13:37:00.000Z

Manage multiple hosts running VMWare and Xen with BixData

BixData - http://www.bixdata.com/

Distribution for Parallel Clusters

2006-11-17T13:36:00.000Z

Another distro arrived to the land of parallel linux cluster computing.

ParallelKnoppix - http://parallelknoppix.cebacad.net/

Course Management System

2006-11-17T12:52:00.000Z

http://moodle.org/

Where did my disk space go?

2005-12-21T14:22:00.000Z

Sometimes I wonder where all my disk space went. It's not that I have much of it, it is simply that I don't have a clue where did it go. And the more I free up, the more it keeps on disappearing.

Well, Firelight is the answer. It scans any directory, even remove ones, and displayes the usage in a comprehensive, zoomable, pie chart.

Suddenly, there they were... the forgotten files that were eating up my disk space... squash... squash... killed!

uniq

2005-12-16T00:28:00.000Z

Uniq is a not so well known command from the GNU Coreutils which removes duplicate lines from a sorted file. FYI, sorting can be done with... sort!

Simple Backups

2005-11-28T22:20:00.000Z

One of the Google's 2005 summer code products, sbackup, is a simple backup tool that will allow any newbie to backup its own data with simple steps. Read about it here.

Very interesting, but of course quite limited. If you are interested in full featured backup solutions for Linux, UNIX and Windows(!), I suggest bacula.

A simple coincidence?!

2005-11-28T22:14:00.000Z

Recently, Peter J. Quinn, director of the state's Informational Technology Division, is at the center of the decision to require that all documents produced by the state of Massachussets executive branch are to be stored in a new open standard format, called Open Document.

Some days ago, the administration has launched a review of several trips by Mr. Quinn to conferences out-of-state.

Nothing to be worried about in a democratic state that struggles everyday to fight it's own corruption.

All plain normal.

Nothing to see here. Move on ... Move on... Just a routine investigation ...

Pure coincidence?

Read this article.

On virtualization and the x86 arch

2005-11-28T08:42:00.000Z

"Forget the OS, it's x86 that's important" is an interesting article about virtualization and a new Sun's approach: Containers.

Read it at TechWorld.com

Some security principles

2005-11-28T08:24:00.000Z

Newsforge as published an interesting article about security.

The words of the Prophet...

2005-11-14T07:53:00.000Z

You may find the words of the prophet Stallman here.

Read them so you may FREE yourself...

K3DSurf - Because Mathematics can be so fun!

2005-11-12T22:02:00.000Z

K3DSurf is a program to visualize and manipulate Mathematical models in three, four, five and six dimensions. Theses Mathematical Objects, described with implicit/explicit parametric equations, can be either surfaces or curves.

kpolynome

2005-11-12T22:01:00.000Z

kpolynome is a KDE program that calculates polynomes based on given data coordinates.

rpcalc - reverse polish notation calculator

2005-11-12T22:00:00.000Z

rpcalc is a reverse polish notation calculator for KDE.

ConvertAll - A unit converter tool

2005-11-12T21:41:00.000Z

With ConvertAll you can combine the units any way you want. If you want to convert from inches per decade, that's fine. Or from meter-pounds. Or from cubic nautical miles.

QOscC - a software osciloscope

2005-11-12T21:37:00.000Z

QOscC is a highly flexible and configurable software Oscilloscope with a large number of features. This includes support for any number of audio devices (ALSA, OSS, JACK and a number of Serial Multimeters), each with any number of channels that the hardware supports. Each scope display can be configured individually to different display types and variants. e.g. you can chose from standard y-t mode (as on an usual oscilloscope), xy mode (e.g. for measuring the phase shift between two signals) of the FFT mode (to view a spectrum plot of the signal).

Flat images of planets

2005-11-12T21:33:00.000Z

flatplanet provides flat maps of planets that can be used for various purposes...

Xplanet

2005-11-12T21:32:00.000Z

Xplanet renders an image of the earth or other space objects into the X root window. All of the major planets and most satellites can be drawn, similar to the Solar System Simulator. A number of different map projections are also supported, including azimuthal, Lambert, Mercator, Mollweide, orthographic, and rectangular.

SkyChart - night sky mapper for amateur astronomers

2005-11-12T21:27:00.000Z

SkyChart is software to draw a map of the night sky for the amateur astronomer from a bunch of stars and nebulae catalogs. It shows the position of the planets, simulates an eclipse, and shows artificial satellites. It can also drive telescopes.

G.System - The evolving universe

2005-11-12T21:13:00.000Z

G.System

An evolving Universe
Ever dreamed of a nice piece of software that actually tries to simulate the evolution of an universe? Ever thought it would be possible?
The G System tries to do exactly this. It is both a free framework for simulation as well as a virtual reality itself which is growing to an universe in which life's evolution takes place.

KBibTeX

2005-11-12T21:06:00.000Z

KBibTeX is a BibTeX editor for KDE.

LabPlot - 2D/3D plotting tool

2005-11-12T21:03:00.000Z

LabPlot is a KDE application for data plotting and function analysis. It support both 2D and 3D plots and tries to emulate most of the functions supported by programs like Microcal Origin or SPSS Sigmaplot.

Qalculate!

2005-11-12T21:00:00.000Z

Qalculate! is a multi-purpose desktop calculator for GNU/Linux. It is small and simple to use but with much power and versatility underneath. Features include customizable functions, units, arbitrary precision, plotting, and a user-friendly interface.

It has an incredible feature list.

gaiw - Grace ASCII Import Wizard

2005-11-12T20:58:00.000Z

The Grace ASCII Import Wizard ("gaiw") is a cross-platform, Qt-based GUI allowing Grace users to create 2D XY plots from ASCII data files very easily.
Grace is a very powerful, cross-platform, open-source 2D-plotting program which enjoys an excellent reputation of quality. However, few people actually create their data sets manually and the import functionality delivered with Grace makes the creation of complex plots (many graphs with many curves in each graph, with data coming from different files) somewhat tedious.

SCons - software construction tool

2005-11-12T20:42:00.000Z

SCons is an Open Source software construction tool.
It aims to be the next-generation build tool. The website pictures SCons as an improved, cross-platform substitute for the classic Make utility with integrated functionality similar to autoconf/automake and compiler caches such as ccache. In short, SCons should be an easier, more reliable and faster way to build software.