Archive for the 'PlanetUbuntu' Category

System calls quizz

Wednesday, August 25th, 2010

What is special about the socket, connect, bind, accept, … system calls? How does the errno value get from the kernel to applications? Some system calls return a number of times different of 1 in some cases. Which ones? (Put differently: enter a syscall once, exit more or less than once. Which ones can do […]

RVM: seriously?

Tuesday, August 24th, 2010

There’s some hype in the Ruby community about RVM (Ruby Version Manager). It’s a tool that allows to switch between Ruby versions on the same system (much like what the alternatives system provides for Java on Debian, except that RVM does it either system-wide or per-user). However, when you look at it, RVM looks quite […]

Ubuntu bugs with patches on the PTS and the QA Packages Overview

Monday, August 2nd, 2010

Like the Debian BTS, Launchpad is full of open bugs with patches[1]. They have an ongoing effort called Operation Cleansweep whose goal is to get the number of bugs with patches to zero, by reviewing patches and forwarding them upstream or to Debian. Since it really makes sense to expose bugs with patches to the […]

Debcamp+Debconf again! (update)

Friday, July 30th, 2010

As I did since 2007, I will be attending Debconf again this year. I have been quite busy recently, and am lagging behind in some of my Debian work, so I plan to use Debconf to get stuff done, not just socialize and attend talks. Here is my TODO list, basically by order of “willingness […]

#debian-ubuntu on OFTC

Sunday, June 6th, 2010

If you are a Debian developer and need realtime interaction with an Ubuntu developer about the state of your packages in Ubuntu (or vice-versa), #debian-ubuntu on might be useful. I had forgotten about that channel, but it resurfaced during the discussions about improving communication between both projects.

EtherPad: web-based collaborative editor

Sunday, June 6th, 2010

I recently (during a UDS lightning talk) discovered EtherPad. It’s a collaborative editor (like gobby), but uses a browser instead of a standalone application. It’s free software (Google open sourced it after buying the company that was developing it), and there’s a free online instance at Setting up a new pad is as simple […]

XMPP Video calls with Nokia N900

Friday, June 4th, 2010

So, this morning, I did my first video call over XMPP between two N900. However, so far, I failed to do an XMPP video call from an N900 to something else. When I try to call pidgin on my laptop, pidgin simply crashes, but of course that’s not a serious bug if people can DOS […]

Ubuntu and Debian

Saturday, May 29th, 2010

I recently noticed the new Ubuntu and Debian link on every page of That is very nice, and much better than the previous situation. Debian is also mentioned on the pages about Easy administration and Security. Canonical has clearly improved a lot in the way they communicate about how Ubuntu bases its development on […]

Booting ISO or USB key images directly from Grub2?

Tuesday, May 25th, 2010

I’m playing with the idea of booting ISO images and USB key images stored in a disk partition directly from Grub2. That would allow to install Linux or test liveCDs without even using a USB key. It seems that Grub2 has everything needed for that (with a combination of drivemap and chainloader), but I can’t […]