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Name: Ismael Olea
Member since: 2000-10-24 16:45:00
Last Login: 2015-04-20 11:21:32

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Homepage: http://olea.org/diario/


Ismael has been a free software activist since 1994. He has coordinated the Spanish Linux Documentation Project TLDP-ES (known as LuCAS) since 1998 to 2005, is a founding member of the Spanish Linux users association Hispalinux and the local groups Indalinux and Linux Madrid and has deeply involved in the organization of the Hispalinux's congresses. In his work career had been CTO of one of the very first commercial linux distributions in Spain, HispaFuentes Linux, and now manages their own consulting company, Planeta Olea SL, specialized on technology strategy and consultancy about free libre open source software, FLOSS, and the digital revolution. He is member of the GNOME Foundation, the Foundation for a Free Information Infrastructure, the Instituto de Estudios Almerienses and is a visiting lecturer at the Instituto Superior de Estudios e Investigaciones Tecnolológicas, Caracas (Venezuela). For long time is a passionate researcher on electronic publishing in almost all its facets and a supporter of applying the knowledge economy of FLOSS on the linguistic resources for the Spanish language. For the last years is performing an intense activity on the development of the SOOS concept, «Standard Organizational Operating System» in the framework of an open digital revolution. Had given dozens of talks in Spain, France and Latin America. He is devoted to Our Father Genarín of León and tries to be sure everybody knows he comes from Almería (Spain).


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29 Dec 2015 (updated 29 Dec 2015 at 09:09 UTC) »

Sonic Pi packaged for Fedora

Maybe you know about Sonic Pi, the system to learn programming playing with music. Now I want to give it a try in my system (Fedora 23) and my sysadmin-TOC syndrome obligues me first to package it into RPM. Now I have good and bad news. The good news are I have a testing release of Sonic Pi for Fedora 23. It includes a desktop file too. The bad news are... it doesn't work yet. Sonic Pi uses jackd while a common Fedora Workstation uses pulseaudio and both try to manage the sound device by themselves.

After a quick googling seems possible to get a procedure for using some working configuration for puleaudio+jackd but I didn't have the time to find and check them. Meanwhile, if the RPM package is useful for someone here it is.

This package depends of Supercollider as provided by Planet CCRMA package repository. To use this Sonic Pi maybe you'll want to add the repository to your system.

Please feedback here if you know how to make sound to work.

PD: Post edited to add references to Planet CCRMA repositorie.

Syndicated 2015-12-29 04:40:00 (Updated 2015-12-29 09:09:55) from Ismael Olea

Running EPF (Eclipse Process Framework) in Linux

For many time I wanted to learn to use EPF but technical reasons always stoped me. Blame me because I'm not an Eclipse guy and I'm not into its eclipse-isms but until today I have not been able to launch it. Now, wirth this really simple recipe you'll be able to run it.

Initial technical scenario:

Then unzip the file and execute:

$ unzip epf-composer-
$ cd epf-composer
[epf-composer]$ ./epf
Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /home/olea/epf-composer/plugins/org.eclipse.equinox.launcher.gtk.linux.x86_1.1.2.R36x_v20101019_1345/eclipse_1310.so which might have disabled stack guard. The VM will try to fix the stack guard now.
It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.

(Epf:27092): Gtk-WARNING **: Unable to locate theme engine in module_path: "adwaita",

(Epf:27092): Gtk-WARNING **: Unable to locate theme engine in module_path: "adwaita",
Gtk-Message: Failed to load module "pk-gtk-module"
Gtk-Message: Failed to load module "canberra-gtk-module"

If you, like me, don't know nothing about Eclipse maybe you are doomed because the real problem is everything but clear. What you are having is the EPF application asking for a 32 bits java VM runtime. Nothing more, nothing less. But now is very easy to fix:
  1. just get a 32 bits java VM
  2. adjust epf-composer/epf.ini to use it
In my case I've installed a Java 1.7 (in my case from the same Russian Fedora repo):

and then change ~/epf-composer/epf.ini from this:


to this:


Please note the precise path may be different in your system but in any case it should point to a 32 bit java binary.

Then you just need to launch EPF and you are ready:

$ epf-composer/epf


Syndicated 2015-12-29 00:17:00 from Ismael Olea

De visita en Madrid

Con la excusa de participar en el Taller de nanotecnología casera organizado por MediaLab Prado, de la última visita en Madrid me traigo entre otras varias cosas: 

  • conocer los trabajos de En-Te Hwu que han llevado a la creación de un microscopio de fuerza atómica de bajo coste y una alternativa OSS en desarrollo: OpenAFM;
  • descubrir el alucinante proyecto de microscopio de barrido láser opensource de Raquel López, del cual espero ansioso novedades de las versiones más avanzadas;
  • participar en la fundación del grupo de trabajo de Microscopía DIY creado en MediaLab Prado a consecuencia y por los participantes del taller impartido por En-Te;
  • visitar por primera vez a los amigos del Makespace en Madrid, que es otro punto de encuentro de potencial BESTIAL;
  • descubrir a la gente del BivosLab/Biocore, que están haciendo cosas que tal vez podamos aplicar también en el Club de Cacharreo;
  • el agradable reencuentro con los amigos de MediaLab Prado, de los cuales cada vez soy más admirador y que utilizo como inspiración para construir el HackLab Almería;
  • más equipos para la colección del museo de retroinformática (gracias Kix);
  • tratos con la realeza (sí, realmente estoy en esa foto, con mi camiseta celeste) ZOMG;
  • y hasta la petición de Jesús Cea de escribir mis experiencias «pastoreando los procomunes».

Un viaje preñado de... TODO.

Syndicated 2015-11-22 03:19:00 from Ismael Olea

5 Oct 2015 (updated 5 Oct 2015 at 20:10 UTC) »

Los sueldos en el mundo de la informática

Sólo como referencia, he encontrado esta publicación del ministerio de trabajo de los EEUU: May 2014 National Occupational Employment and Wage Estimates con las estadísticas de sueldos de las profesiones informáticas en ese país:

Occupation code Occupation title (click on the occupation title to view its profile) Level Employment Employment RSE Employment per 1,000 jobs Median hourly wage Mean hourly wage Annual mean wage Mean wage RSE
11-3021 Computer and Information Systems Managers detail 330360 0.8% 2,445 $61.37 $65.52 $136,280 0.4%
15-0000 Computer and Mathematical Occupations major 3834180 0.5% 28,374 $38.18 $40.37 $83,970 0.5%
15-1100 Computer Occupations minor 3692980 0.5% 27,329 $38.17 $40.31 $83,840 0.5%
15-1111 Computer and Information Research Scientists detail 24210 4.2% 0,179 $52.09 $54.42 $113,190 1.4%
15-1120 Computer and Information Analysts broad 608500 0.9% 4,503 $40.13 $42.25 $87,890 0.3%
15-1121 Computer Systems Analysts detail 528320 0.9% 3,910 $39.76 $41.98 $87,320 0.4%
15-1122 Information Security Analysts detail 80180 2.0% 0,593 $42.74 $44.04 $91,600 0.6%
15-1130 Software Developers and Programmers broad 1492040 0.8% 11,042 $43.90 $45.81 $95,280 0.8%
15-1131 Computer Programmers detail 302150 1.4% 2,236 $37.28 $39.75 $82,690 1.3%
15-1132 Software Developers, Applications detail 686470 1.2% 5,080 $45.92 $47.85 $99,530 1.1%
15-1133 Software Developers, Systems Software detail 382400 1.6% 2,830 $49.46 $50.98 $106,050 0.6%
15-1134 Web Developers detail 121020 1.5% 0,896 $30.52 $33.02 $68,670 0.7%
15-1140 Database and Systems Administrators and Network Architects broad 617680 0.6% 4,571 $38.87 $40.85 $84,970 0.2%
15-1141 Database Administrators detail 112170 1.0% 0,830 $38.60 $39.56 $82,280 0.3%
15-1142 Network and Computer Systems Administrators detail 365430 0.8% 2,704 $36.44 $38.35 $79,770 0.3%
15-1143 Computer Network Architects detail 140080 1.4% 1,037 $47.32 $48.42 $100,710 0.4%
15-1150 Computer Support Specialists broad 738030 0.7% 5,462 $24.22 $26.42 $54,960 0.3%
15-1151 Computer User Support Specialists detail 563540 0.8% 4,170 $22.89 $24.76 $51,500 0.3%
15-1152 Computer Network Support Specialists detail 174490 1.3% 1,291 $29.72 $31.80 $66,140 0.5%
15-1199 Computer Occupations, All Other detail 212510 1.0% 1,573 $40.10 $41.12 $85,520 1.0%

Ojalá os sirvan.

Syndicated 2015-10-05 23:58:00 (Updated 2015-10-05 20:10:45) from Ismael Olea

How after an upgrade my /etc/sysconfig/docker-storage got me mad

I have a running docker service in a Fedora 21 sustem for a while. Recently I got some disgusting erros preventing restart docker:

device-mapper: table: 253:7: thin: Couldn't open thin
internal device 

I am a docker newbie so I lost a lot of time thinking if my thin device got corrupt or whatever. Indeed I openened an issue (#16341) to the docker project to report it. But now I conclude is not an upstream error but a Fedora's packaging one.

The problem was caused in this regular update:

which did this:
+DOCKER_STORAGE_OPTIONS=--storage-driver devicemapper --storage-opt
-dm.fs=xfs --storage-opt dm.thinpooldev=/dev/mapper/vg_patxuko-docker--pool

And after the next system reboot the docker service was unable to restart. Removing the DOCKER_STORAGE_OPTIONS value returned system to service.

More details at this comment.

Hope it helps


Syndicated 2015-09-19 09:34:00 from Ismael Olea

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