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Jorge Castro: Free Official Ubuntu Books for Local Teams

Planet Ubuntu - Wed, 2014-08-20 17:16

Prentice Hall has just released the 8th Ed. of “The Official Ubuntu Book”, authored by Matthew Helmke and Elizabeth K. Joseph with José Antonio Rey, Philip Ballew and Benjamin Mako Hill.

This is the book’s first update in 2 years and as the authors state in their Preface, “…a large part of this book has been rewritten—not because the earlier editions were bad, but because so much has happened since the previous edition was published. This book chronicles the major changes that affect typical users and will help anyone learn the foundations, the history, and how to harness the potential of the free software in Ubuntu.”

As with prior editions, publisher Prentice Hall has kindly offered to ship approved LoCo teams each (1) free copy of this new edition. To keep this as simple as possible, you can request your book by following these steps. The team contact shown on our LoCo Team List (and only the team contact) should send an email to Heather Fox at and include the following details:

  • Your full name
  • Which team you are from
  • If your team resides within North America, please provide: Your complete street address (the book will ship by UPS)
  • If your team resides outside North America, you will first be emailed a voucher code to download the complete eBook bundle from the publisher site, InformIT, which includes the ePub/mobi/pdf files.

If your team does reside outside North America and you wish to be considered for a print copy, please provide:

Your complete street address, region, country AND IMPORTANT: Your phone number, including country and area code. (Pearson will make its best effort to arrange shipment through its nearest corporate office.)

A few notes:

  • Only approved teams are eligible for a free copy of the book.
  • Only the team contact for each team can make the request for the book.
  • There is a limit of (1) copy of each book per approved team.
  • Prentice Hall will cover postage, but not any import tax or other shipping fees.
  • When you have the books, it is up to you what you do with them. We recommend you share them between members of the team. LoCo Leaders: please don’t hog them for yourselves!

If you have any questions or concerns, please directly contact Pearson/Prentice Hall’s Heather Fox at Also, for those teams who are not approved or yet to be approved, you can still score a rather nice 35% discount on the books by registering your LoCo with the Pearson User Group Program.

Svetlana Belkin: The Certificate of Ubuntu Membership

Planet Ubuntu - Wed, 2014-08-20 17:10

Today, in mail, came my Certificate of Ubuntu Membership that I requested back in February.  The photo was taken via my Ubuntu Touch on my Nexus 7 2013.

Kubuntu: KDE Applications and Development Platform 4.14

Planet Ubuntu - Wed, 2014-08-20 15:11

Packages for the release of KDE SC 4.14 are available for Kubuntu 14.04LTS and our development release. You can get them from the Kubuntu Backports PPA. It includes an update of Plasma Desktop to 4.11.11.

Bugs in the packaging should be reported to kubuntu-ppa on Launchpad. Bugs in the software to KDE.

Ubuntu Women: Calling For Testers for Orientation Quiz

Planet Ubuntu - Wed, 2014-08-20 11:56

The Ubuntu Women Project is pleased to present an orientation quiz that is aimed to help new comers into the Ubuntu Community to find their niche and get involved.  The base quiz was taken from the Ubuntu Italian LoCo. Our plans is to put this quiz on  but we are seeking testers for it first!

How to test it:

Go to the page where the quiz is and play around with answering the questions.  If you find an issue, please e-mail the Ubuntu Women Mailing-List at  If you want to see the code, you may ask Lyz at or me at

Jonathan Riddell: Qt Licence Update

Planet Ubuntu - Wed, 2014-08-20 09:27
KDE Project:

Today Qt announced some changes to their licence. The KDE Free Qt team have been working behind the scenes to make these happen and we should be very thankful for the work they put in. Qt code was LGPLv2.1 or GPLv3 (this also allows GPLv2). Existing modules will add LGPLv3 to that. This means I can get rid of the part of the KDE Licensing Policy which says "Note: code may not be copied from Qt into KDE Platform as Qt is LGPLv2.1 only which would prevent it being used under LGPL 3".

New modules, starting with the new web module QtWebEngine (which uses Blink) will be LGPLv3 or GPLv2. Getting rid of LGPLv2.1 means better preserving our freedoms (can't use patents to restrict, must allow reverse enginerring, must allow to replace Qt etc). It's not a problem for the new Qt modules to link to LGPLv2 or LGPLv2+ libraries or applications of any licence (as long as they allow the freedoms needed such as those listed above). One problem with LGPLv3 is you can't link a GPLv2 only application to it (not because LGPLv3 prevents it but because GPL2 prevents it), this is not a problem here because it will be dual licenced as GPLv2 alongside.

The main action this prevents is directly copying code from the new Qt modules into Frameworks, but as noted above we forbid doing that anyway.

With the new that Qt moved to Digia and there is a new company being spun out I had been slightly worried that the new modules would be restricted further to encourage more commercial licences of Qt. This is indeed the case and it's being done in the best possible way, thanks Digia.

Benjamin Kerensa: Mozilla and Open Diversity Data

Planet Ubuntu - Wed, 2014-08-20 05:28

I have been aware of the Open Diversity Data project for awhile. It is the work of the wonderful members of Double Union and their community of awesome contributors. Recently, a Mozillian tweeted that Mozilla should release it’s Diversity Data. It is my understanding also that a discussion happened internally and for whatever reason a release of Mozilla’s diversity data did not entirely result although some numbers are available here.

Anyways, I’m now going to bring this suggestion up again and encourage that both Mozilla Corporation and Mozilla Foundation release individual diversity data reports in the form of some numbers, graphs and a blog post and perhaps a combined one of both orgs.

I would encourage other Mozillians to support the push for opening this data by sharing this blog post on the Social Media as an indicator of supporting Open Diversity Data publishing by Mozilla or by retweeting this.

I really think our Manifesto encourages us to support initiatives like this; specifically principle number two of our manifesto. If other companies (Kudos!) that are less transparent than Mozilla can do it then I think we have to do this.

Finally, I would like to encourage Mozilla to consider creating a position of VP of Diversity and Inclusion to oversee our various diversity and inclusion efforts and to help plan and create a vision for future efforts at Mozilla. Sure we have already people who kind of do this but it is not their full-time role.

Anyways that’s all I have on this…

Svetlana Belkin: Ohio Team Wiki Team Wiki Update/Clean Up

Planet Ubuntu - Tue, 2014-08-19 19:23

As my recent project, that is Ubuntu related, and a very overdo task on my To Do list, I worked on updating the Ohio Team Wiki pages (I took some ideas from how the Doc Team Wiki pages look);

  • I removed the unneeded pages after I had approval from Stephen Michael Kellat
  • I lumped similar pages such as the agendas to the meetings and the various events into main pages (/Meetings and /Events) and linked those two main pages on the home page
  • I only have two things left to do which is to fix the banner and find all of the missing records from the mailing list

Hopefully it is cleaner and easier to get the information that one needs.

Bodhi.Zazen: Music practice

Planet Ubuntu - Tue, 2014-08-19 18:26

With the advent of YouTube , there is a plethora of music “lessons” available on the internet. When learning new riffs, however, it is helpful to be able to alter the speed of playback and play selective sections of the lesson.

For some time I have been using audacity, which has the advantage of cross platform availability. However, audacity is a bit of overkill and I find it a bit slow at times.

In addition, when selecting a particular segment within the lesson, skipping dialog or parts already mastered, audacity is a bit “clunky” and somewhat time consuming. Alternately one can splice the lessons with ffmpeg, again somewhat time consuming.

Recently I came across a simple, no frills, light weight solution, “Play it slowly”

Home page

Download (github)

Play it slowly is a light weight application but has a simple , clean interface. It is simple to use and has basic features such as:

  1. Slow the speed on playback without altering pitch.
  2. Easily mark, move, and reset sections of a track for playback.
  3. Easy to start/stop/restart playback.

Play is slowly is in the Debian and Ubuntu repositories

sudo apt-get install playitslowly

For Fedora, first install the dependencies:

yum install gstreamer-python gstreamer-plugins-bad-extras

Download the source code from the above link (version 1.4.0 at the time of this writing)

Extract the tarball and install

tar xvzf playitslowly-1.4.0.tar.gz
cd playitslowly-1.4.0
sudo python install

For additional options see the README or run:

python --help

Ubuntu Kernel Team: Kernel Team Meeting Minutes – August 19, 2014

Planet Ubuntu - Tue, 2014-08-19 17:17
Meeting Minutes

IRC Log of the meeting.

Meeting minutes.


20140819 Meeting Agenda

Release Metrics and Incoming Bugs

Release metrics and incoming bug data can be reviewed at the following link:

Status: Utopic Development Kernel

The Utopic kernel has been rebased to the first v3.16.1 upstream stable
kernel and uploaded to the archive, ie. linux-3.16.0-9.14. Please test
and let us know your results.
Important upcoming dates:
Thurs Aug 21 – Utopic Feature Freeze (~2 days away)
Mon Sep 22 – Utopic Final Beta Freeze (~5 weeks away)
Thurs Sep 25 – Utopic Final Beta (~5 weeks away)
Thurs Oct 9 – Utopic Kernel Freeze (~7 weeks away)
Thurs Oct 16 – Utopic Final Freeze (~8 weeks away)
Thurs Oct 23 – Utopic 14.10 Release (~9 weeks away)

Status: CVE’s

The current CVE status can be reviewed at the following link:

Status: Stable, Security, and Bugfix Kernel Updates – Trusty/Saucy/Precise/Lucid

Status for the main kernels, until today (Aug. 19):

  • Lucid – verification & testing
  • Precise – verification & testing
  • Trusty – verification & testing

    Current opened tracking bugs details:


    For SRUs, SRU report is a good source of information:



    cycle: 08-Aug through 29-Aug
    08-Aug Last day for kernel commits for this cycle
    10-Aug – 16-Aug Kernel prep week.
    17-Aug – 23-Aug Bug verification & Regression testing.
    24-Aug – 29-Aug Regression testing & Release to -updates.

    cycle: 29-Aug through 20-Sep
    29-Aug Last day for kernel commits for this cycle
    31-Sep – 06-Sep Kernel prep week.
    07-Sep – 13-Sep Bug verification & Regression testing.
    14-Sep – 20-Sep Regression testing & Release to -updates.

Open Discussion or Questions? Raise your hand to be recognized

No open discussion.

The Fridge: Interview with Svetlana Belkin

Planet Ubuntu - Tue, 2014-08-19 07:46

Elizabeth K. Joseph: Can you tell us a little about yourself?

Svetlana Belkin: I am Svetlana Belkin, an active Ubuntu Member since July 2013, and I gained my Membership on February 6, 2014. This month will mark my first year of working in the Ubuntu Community.

I am not a developer, I cannot code to save my life!

I am a biology major with a focus on Cellular and Molecular Biology who uses Ubuntu because it and the FOSS world match how I think.

EKJ: What inspired you to get involved with the Ubuntu Community?

SB: An idea for a multi-player online game that is based on Mario Party but instead of mini-games, players use cards that are either attack, defense, or traps to get coins. The one with the most coins wins but everyone can keep the coins that they gained to shop for more cards and avatar items.

This was about one year ago, and I wanted to find someone who could help develop it. Since I am a woman, I joined Ubuntu Women to seek one out. But I quickly found out that it was a bad choice and I started to work on improving the Ubuntu Women Wiki to have it up-to-date. That’s what led me into doing other things within the Ubuntu Community.

EKJ: What are your roles within the Ubuntu community and what plans do you have for the future?

SB: My main role within the Ubuntu Community is to help newcomers to find their place in the Community and to network with women (Ubuntu Women) and scientists (Ubuntu Scientists) alike to improve the FOSS world.

I also help the Ubuntu Documentation team to keep the Ubuntu Community Help Wiki up-to-date.

My future plans are to train new leaders within the Community so they know how to lead.

EKJ: Have you hit any barriers with getting involved and what can you recommend to newcomers?

SB: Newcomers need to remember that they do not need to be a developer to get involved – that’s the barrier that I hit.

I would recommend to newcomers that they should not think that they need to be developers, and they should take these steps: they should start out small, join the team/project and its mailing-list, make sure to read all of the documentation for that project/team, and introduce themselves to the team via the mailing-lists. The best route – if they do not know what skills they have or what teams/projects to join – is to go to their Local Community and ask on the mailing list or their IRC channel.

EKJ: Is there anything you feel the Ubuntu project could improve on when it comes to new folks coming to the project?

SB: The main thing is the lack of Ubuntu Recruitment/Promo/Comms teams where the new folks can join and ask what teams/projects they can put their skills into. The other flavors have these teams but Ubuntu does not.

EKJ: What other things are you interested in outside of open source and Ubuntu?

I make art from time to time, and play my favorite and the only Multi-User Dungeon, Armageddon MUD.

Originally posted by Elizabeth K. Joseph in Full Circle Magazine Issue #87 on July 25, 2014

The Fridge: Ubuntu Weekly Newsletter Issue 379

Planet Ubuntu - Tue, 2014-08-19 04:22

Stephen Michael Kellat: Restart

Planet Ubuntu - Tue, 2014-08-19 00:00

Eventually even a blog can be brought back to life. A simple list may be best in order, for now, at the very least:

  • I now have my General-class amateur radio license in the United States
    • I have to find a good way to make use of it
    • The hamexam package in the archive was a great study aid
    • The use of fldigi on high frequency shortwave bands is now possibly in order
  • I am blessed to have a great team of deputies to assist in leading Ubuntu Ohio
  • Podcasting is still offline for the time being due to work-related circumstances
  • The work of the LoCo Council has gotten interesting though due to OpenID issues I cannot write blog posts on that site to talk about things
  • I have been increasingly assisting in backporting software relating to the network such as dianara and pumpa

Daniel Pocock: Is WebRTC private?

Planet Ubuntu - Mon, 2014-08-18 19:55

With the exciting developments at, many people are starting to look more closely at browser-based real-time communications.

Some have dared to ask: does it solve the privacy problems of existing solutions?

Privacy is a relative term

Perfect privacy and its technical manifestations are hard to define. I had a go at it in a blog on the Gold Standard for free communications technology on 5 June 2013. By pure co-incidence, a few hours later, the first Snowden leaks appeared and this particular human right was suddenly thrust into the spotlight.

WebRTC and ICE privacy risk

WebRTC does not give you perfect privacy.

At least one astute observer at my session at Paris mini-DebConf 2014 questioned the privacy of Interactive Connectivity Establishment (ICE, RFC 5245).

In its most basic form, ICE scans all the local IP addresses on your machine and NAT gateway and sends them to the person calling you so that their phone can find the optimal path to contact you. This clearly has privacy implications as a caller can work out which ISP you are connected to and some rough details of your network topology at any given moment in time.

What WebRTC does bring to the table

Some of this can be mitigated though: an ICE implementation can be tuned so that it only advertises the IP address of a dedicated relay host. If you can afford a little latency, your privacy is safe again. This privacy protecting initiative could be made by a browser vendor such as Mozilla or it can be done in JavaScript by a softphone such as JSCommunicator.

Many individuals are now using a proprietary softphone to talk to family and friends around the world. The softphone in question has properties like a virus, siphoning away your private information. This proprietary softphone is also an insidious threat to open source and free operating systems on the desktop. WebRTC is a positive step back from the brink. It gives people a choice.

WebRTC is a particularly relevant choice for business. Can you imagine going to a business and asking them to make all their email communication through hotmail? When a business starts using a particular proprietary softphone, how is it any different? WebRTC offers a solution that is actually easier for the user and can be secured back to the business network using TLS.

WebRTC is based on open standards, particularly HTML5. Leading implementations, such as the SIP over WebSocket support in reSIProcate, JSCommunicator and the DruCall module for Drupal are fully open source. Not only is it great to be free, it is possible to extend and customize any of these components.

What is missing

There are some things that are not quite there yet and require a serious effort from the browser vendors. At the top of the list for privacy:

  • ZRTP support - browsers currently support DTLS-SRTP, which is based on X.509. ZRTP is more like PGP, a democratic and distributed peer-to-peer privacy solution without needing to trust some central certificate authority.
  • TLS with PGP - the TLS protocol used to secure the WebSocket signalling channel is also based on X.509 with the risk of a central certificate authority. There is increasing chatter about the need for TLS to use PGP instead of X.509 and WebRTC would be a big winner if this were to eventuate and be combined with ZRTP.

You may think "I'll believe it when I see it". Each of these features, including WebRTC itself, is a piece of the puzzle and even solving one piece at a time brings people further out of danger from the proprietary mess the world lives with today.

Jono Bacon: New Facebook Page

Planet Ubuntu - Mon, 2014-08-18 16:35

As many of you will know, I am really passionate about growing strong and inspirational communities. I want all communities to benefit from well organized, structured, and empowerinfg community leadership. This is why I wrote The Art of Community and Dealing With Disrespect, and founded the Community Leadership Summit and Community Leadership Forum to further the art and science of community leadership.

In my work I am sharing lots of content, blog posts, videos, and other guidance via my new Facebook page. I would be really grateful if you could hop over and Like it to help build some momentum.

Many thanks!

Stuart Langridge: Do you do it anyway?

Planet Ubuntu - Mon, 2014-08-18 13:17

Let us imagine that you are a designer, designing a thing. Doesn’t matter here what the thing is; it might be a piece of software or a phone or a car or a coffee machine or a tea cup. Further imagine that there are already lots of people using this thing, and a whole bunch of those people legitimately want it to do something that it currently does not. You’d like the thing to have this feature, but importantly you can’t work out how to add it such that it’s beautifully integrated and doesn’t compromise any of the other stuff. (That might be because there genuinely is no way, or just because you haven’t thought of one yet, and obviously the second of those looks like the first one to you.)

The fundamental question dividing everyone into two camps is: do you do it anyway?

If you add the feature, then you’ll either do so relatively visibly or relatively invisibly. If it’s relatively visible then it will compromise the overall feel of the thing and maybe make it more difficult to use its existing features (because you can’t think of a seamless brilliant way to add it, so it will be unseamless and unbrilliant and maybe get in the way). If you add it relatively invisibly, then most people will not even discover that it exists and only a subset of those will actually learn how to use it at all.

However, if you don’t add it, then lots of people who could benefit from it, want it, and could have it aren’t allowed, even if they’re prepared to learn a complex way to make it happen.

These two camps, these two approaches, are contradictory, in opposition, irreconcilable, and equally valid.

It’s the “equally valid” bit that people have trouble with.

This war is played out, day after day, hour after hour, in every field of endeavour. And not once have I ever seen anyone become convinced by an argument to switch to the other side. I have seen people switch, and lots of them, but it’s a gradual process; nobody reads a frantic and shrill denunciation of their current opinion and then immediately crosses the floor.

There are also many people who would protest this division into two opposing camps; who would say that one should strike a balance. Everyone who says this is lying. It is not possible to strike a balance between these two things. You may well believe yourself to straddle this divide like an Adonis, but what that actually means is that sometimes you’re in one camp and sometimes you’re in the other, not that you’re simultaneously in both. Saying “well, you should add the feature, but as sensitively as possible” means “if it can’t be done sensitively, I’ll do it anyway”. Saying “it’s important to be user-focused, not feature-focused” means “people don’t get to have this thing even if they want it”. Doubtless you, gentle reader, would disagree with one of those two characterisations, which proves the point. Both views are equally valid, and they’re in opposition. If you’re of the opinion that it should be possible to straddle this divide, then help those of your comrades who can’t yet do so; help the do-it-anyways to understand that it’s sometimes better to leave a thing out, and help the deny-it-anyways to understand that some of their users are happy to learn about a thing to get best use from it. But if you’re already in one camp, stop telling the other camp that they’re wrong. We have enough heat and not enough light already.

John Baer: Considering Acer nVidia K1 Chromebook

Planet Ubuntu - Sun, 2014-08-17 20:17

Talked about for nearly a year the nVidia Tegra K1 Chromebook arrives via the Acer Chrombook 13 (CB5-311).

How will this Chromebook stack up against the competition? The newly announced nVidia Shield Tablet gives us a glimpse of what the K1 is capable of.

Despite the largely similar clock speeds compared to the Snapdragon 800 we see that the Tegra K1 is generally a step above in performance. Outside of Apple’s A7 SoC and x86 SoCs, NVIDIA is generally solidly ahead of the competition.

When it comes to GPU performance, there’s really no question: the Tegra K1 is easily the fastest in all of our GPU benchmarks. It handily beats every other ARM SoC, including the newest generation of SoCs such as the recently introduced Snapdragon 805 and its Adreno 420 GPU. It’s worth noting that the Snapdragon 805 is likely aimed more at smartphones than tablets, although we are looking at its performance in Qualcomm’s tablet development platform here. Until we get a look at Snapdragon 805 power consumption we can’t really draw any perf/watt conclusions here. Ultimately, the only thing that can top the Shield Tablet is Surface Pro line, which uses more powerful laptop-class hardware.

Source: AnandTech

For $279 you get the following.

  • NVIDIA Tegra K1 Quad Core 2.1 GHz Processor
  • 16 GB Internal Storage
  • 13.3-Inch Screen, NVIDIA Kepler GPU with 192 NVIDIA CUDA cores
  • 1366 x 768 pixels Screen Resolution
  • Chrome OS
  • 802.11 A/C WiFi
  • 13-hour battery life

For $379 you get all of the above and the following.

  • 32 GB Internal Storage
  • 1920 x 1080 pixels Screen Resolution
  • 11-hour battery life

As good as the above looks, I do not expect the early reviews to be kind.

CPU Performance

The first complaint will be the anticipated K1 Google Octane score of 7628 (some are suggesting it may achieve 8000). The new Acer C720 (Core i3-4005U, 4GB RAM) boasts an Octane score of 14530. The Acer C720 (Celeron 2955U, 2GB RAM) boasts an Octane score of 11502. Admittedly this added power comes at the expense of battery life but the rated 7.5 hours from these Intel powered Chromebooks is adequate and many feel an Octane score of 11000 is the minimum required to support a quality Chrome OS user experience.

TN Screen Panel

Manufactures are reluctant to offer IPS screen panel options. The reason is the Education market and cost. Education is a big driver in today’s Chromebook market and TN quality displays are considered adequate.

Build Quality

For a laptop priced at less than $400 unibody polycarbonate plastic is acceptable as long as it doesn’t flex or bend. Historically Chromebooks from Acer have been criticized for their build quality.

Saving Grace

GPU Performance

As noted in the Shield Tablet review the Kepler GPU is best in class. Assuming the keyboard and track pad perform well and the TN panel does a reasonably good job in displaying content, the GPU could move this Chromebook to the head of the class.


You don’t really think of a Chromebook as a gaming console but if you are targeting a teen to young adult audience, gaming may be the item which closes the deal.

We game on all our devices, so why should a Chromebook be any different? With the upcoming launch of addicting games like Miss Take and Oort, along with the promise of great titles thanks to the adoption of WebGL in Unreal Engine 4 and Unity 5, the future of Chromebooks is looking really fun.

Source: TegraZone

Are you considering the Acer nVidia K1 Chromebook? The standard and HD models are up for pre-order on Amazon.

The post Considering Acer nVidia K1 Chromebook appeared first on j-Baer.

Andrew Pollock: [tech] Solar follow up

Planet Ubuntu - Sun, 2014-08-17 17:32

Now that I've had my solar generation system for a little while, I thought I'd write a follow up post on how it's all going.

Energex came out a week ago last Saturday and swapped my electricity meter over for a new digital one that measures grid consumption and excess energy exported. Prior to that point, it was quite fun to watch the old analog meter going backwards. I took a few readings after the system was installed, through to when the analog meter was disconnected, and the meter had a value 26 kWh lower than when I started.

I've really liked how the excess energy generated during the day has effectively masked any relatively small overnight power consumption.

Now that I have the new digital meter things are less exciting. It has a meter measuring how much power I'm buying from the grid, and how much excess power I'm exporting back to the grid. So far, I've bought 32 kWh and exported 53 kWh excess energy. Ideally I want to minimise the excess because what I get paid for it is about a third of what I have to pay to buy it from the grid. The trick is to try and shift around my consumption as much as possible to the daylight hours so that I'm using it rather than exporting it.

On a good day, it seems I'm generating about 10 kWh of energy.

I'm still impatiently waiting for PowerOne to release their WiFi data logger card. Then I'm hoping I can set up something automated to submit my daily production to PVOutput for added geekery.

Mathieu Trudel: Focusing and manual skills

Planet Ubuntu - Sun, 2014-08-17 01:09
I don't think anyone can argue against the fact that to be an effective developer, you need to somehow attain sufficient focus to fully take in the task at hand, and be sufficiently in the zone that answers to the problem at hand come naturally. In a way, programming is like that, a transcendent form of art.

At least, it is, to some degree, for me. And I do feel that given sufficient focus, calm and quiet (or perhaps background noise, depending on the mood I'm in), I can get "in the zone", and solutions to what I'm trying to do come somewhat naturally. Not to say that I'm necessarily writing good code, but at least it forms some sort of sense in my mind.

People have different ways to achieve focus. Some meditate, some have it come to them more easily than others. It does happen that for some people, it works well to execute some kind of ritual to get in the right frame of mind: those can be as insignificant as getting out of bed in a certain way (for those fortunate enough to work from home), or a complicated as necessary. I believe many, if not most, integrate it in their routine, to the point they perhaps forget what it is that they do to attain focus.

For me, it now happens to be shaving, and the associated processes. It used to be kind of a chore, until I picked up wet shaving, and in particular, straight razor shaving.

There's nothing quite like putting a naked, extremely sharp blade against your skin to get you to only think about one thing at a time :)

I won't lie, the first shave with that relic was a scary experience. I wasn't at all sure of myself, with only a few tips and some videos on Youtube as training. I had bought a straight razor from Le Centre du Rasoir near my house after stumbling on articles about barbershops on the web, and it somehow interested me.

Since then, I've slowly taken up the different tasks that go with the actual act of shaving with a straight razor: honing the blade, stropping, shaving, etc.; picking up the different tools required (blade, strop, honing stones, shaving creams or soaps, etc.). It's as I was slowly honing and restoring four straight razors that got to me from eBay and as a gift from my father than I thought of writing this post, in a short break I took from the honing. Getting back home and putting the finishing touches on the four razors got me to think, and I noticed I had again become much more relaxed just by taking the time to do one thing well, taking care in what I was doing.

I think every developer.... well, everyone can benefit in acquiring some kind of ritual like this, using our hands rather that our brain to achieve something. It's at least a great experience to get a little bit away from technology for a short while, visiting old skills of earlier times.

As for the wet shaving itself, I'd be happy to respond to comments here, or blog again about it if there's enough interest in the subject; I'd love to hear that I'm not the only one in the Ubuntu and Debian communities crazy enough to take a blade to my face.

Costales: Destino Ubuconla 2014 - #5 Ubuconla, día 2

Planet Ubuntu - Sat, 2014-08-16 18:55
Uf... que dolor de cabeza... La ducha y el jugo del desayuno sentó muy bien para despejar.

Volvimos con Fernando y Marta a la Universidad donde se realiza la Ubuconla.
Esta vez abrí yo con una charla de creación de webapps. Las tablas se van notando, estando mucho más tranquilo, aunque Naudy me dejó en blanco interrumpiéndome para darme un DVD de Ubuntu (que se sortean al final) en medio de la conferencia (¿!?).
Requisitos para una webapp Comenzando el tallerEl manifiesto de una webappCómo pregunta una web por instalar la webappCómo leer las propiedades de una web
A la vez, Fernando Lanero daba la charla a los niños, para preparar la obra de teatro.
Fernando Lanero comienza la charla a los alumnos¡Qué atentos!
El resto de la mañana apenas tuve tiempo para atender al resto de conferencias, porque varios asistentes me preguntaron dudas o problemas que tenían con sus portátiles, siempre buen momento para hacer nuevos amigos como Elías y pasaron voladas las 2 horas que había hasta la hora de comer.
Resolviendo una duda puntualY un problema que me llevó más de lo previsto
Fernando Amen en su charlaSobre I-Linux
Otra charla de por la mañanaLos alumnos haciendo la primera obra de teatroY comienzan con la segundaFernando y Marta con el profesor de los alumnosFrancisco Javier Pérez El público abarrotó todas las charlas, desde la primera a la última
Charlas, charlas y más charlas
Fernando y Marta marcharon al hotel, porque se encontraban con diarrea.

La comida me gustó mucho, nos invitó la Universidad en una sala donde estábamos todos los organizadores y conferenciantes y estuvo genial compartir un rato tranquilo con el resto de compañeros, especialmente con Fernando García Amen, Sergio Meneses, Dante y Naudy.
Una comida muy amenaEstuvo genial la invitación de la Universidad Tecnológica Simón Bolivar
Tras la comida, conseguí solucionar un problema de un chico que necesitaba un servidor en su portátil y atendí a la charla muy interesante de Ubuntu en sistemas embebidos.
Ubuntu en sistemas embebidosEl hardware también tuvo su protagonismo
La Cubieboard fue la gran triunfadoraLa charla estuvo genialIncluso con una pequeña demostración
Me impresionó mucho la potencia de SAGEMATH, en el taller impartido por Emmanuel.
Emmanuel con su taller de SAGEMATHUna de las mejores charlas
La pasión que transmite Emmanuel hace que te apasionen las matemáticasLu también empezó a tener fiebre y diarrea, así que volvimos pronto para el hotel para que descansase. Tomó un Ibuprofeno y quedó dormida.

A las 19:00 se quedó en la Torre del Reloj para ir a cenar con los conferenciantes que fueran. Yo no quería dejarla sóla, pero me convenció diciendo que realmente iba a dormirse.

Así que a las 18:50 ya estaba como un clavo en la Torre del Reloj. El primero en llegar fue Fernando García Amen, luego Victoria y finalmente Sergio sobre las 19:15 ¡cof cof cof, ejem! ;) Le provoqué diciéndole que si esperábamos un poco más, porque el día anterior a las 19:03 ya se piraron :P Y en un momento ya eramos ocho.

Paseamos un poco hasta parar en un italiano a cenar. Yo opino que viajando hay que intentar comer lo típico del lugar, pero bueno, lo importante en este caso es la compañía. En la cena charlamos y reímos mucho, sobre todo con lo que escogió alguno de los comensales para cenar, que no puedo ni hacer público jajaja > ; )
Una cena inolvidable
Tras la cena, un agradable paseo hasta una heladería donde te dan un delicioso helado de 2 bolas que debe pesar 400 gr :S Eso, junto a los espaguetis con tomate... ¡Toma dieta! :P

Y ya volví con Lu, dejando al resto del equipo que disfrutase de la noche cartaginesa :)
Y mañana el último día de la Ubuconla

Continúa leyendo más de este viaje.

Daniel Pocock: WebRTC: what works, what doesn't

Planet Ubuntu - Sat, 2014-08-16 15:49

With the release of the latest portal update, there are numerous improvements but there are still some known problems too.

The good news is that if you have a web browser, you can probably make successful WebRTC calls from one developer to another without any need to install or configure anything else.

The bad news is that not every permutation of browser and client will work. Here I list some of the limitations so people won't waste time on them.

The SIP proxy supports any SIP client

Just about any SIP client can connect to the proxy server and register. This does not mean that every client will be able to call each other. Generally speaking, modern WebRTC clients will be able to call each other. Standalone softphones or deskphones will call each other. Calling from a normal softphone or deskphone to a WebRTC browser, or vice-versa, will not work though.

Some softphones, like Jitsi, have implemented most of the protocols to communicate with WebRTC but they are yet to put the finishing touches on it.

Chat should just work for any combination of clients

The new WebRTC frontend supports SIP chat messaging.

There is no presence or buddy list support yet.

You can even use a tool like sipsak to accept or send SIP chats from a script.

Chat works for any client new or old. Although a WebRTC user can't call a softphone user, for example, they can send chats to each other.

WebRTC support in Iceweasel 24 on wheezy systems is very limited

On a wheezy system, the most recent Iceweasel update is version 24.7.

This version supports most of WebRTC but does not support TURN relay servers to help you out of a NAT network.

If you call between two wheezy machines on the same NAT network it will work. If the call has to traverse a NAT boundary it will not work.

Wheezy users need to either download a newer Firefox version or use Chromium.

JsSIP doesn't handle ICE elegantly

Internet Connectivity Establishment (ICE, RFC 5245) is meant to prevent calls from being answered with missing audio or video streams.

ICE is a mandatory part of WebRTC.

When correctly implemented, the JavaScript application will exchange ICE candidates and run the connectivity checks before alerting anybody that a call is ringing. If the checks fail (for example, with Iceweasel 24 and NAT), the caller should be told the call can't be made and the callee shouldn't be disturbed at all.

JsSIP is not operating in this manner though. It alerts the callee before telling the browser to start the connectivity checks. Then it even waits for the callee to answer. Only then does it tell the browser to start checking connectivity. This is not a fault with the ICE standard or the browser, it is an implementation problem.

Therefore, until this is fully fixed, people may still see some calls that appear to answer but don't have any media stream. After this is fixed, such calls really will be a thing of the past.

Debian RTC testing is more than just a pipe dream

Although these glitches are not ideal for end users, there is a clear roadmap to resolve them.

There are also a growing collection of workarounds to minimize the inconvenience. For example, JSCommunicator has a hack to detect when somebody is using Iceweasel 24 and just refuse to make the call. See the option require_relay_candidate in the config.js settings file. This also ensures that it will refuse to make a call if the TURN server is offline. Better to give the user a clear error than a call without any audio or video stream.

require_relay_candidate is enabled on because it makes life easier for end users. It is not enabled on because some DDs may be willing to tolerate this issue when testing on a local LAN.


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