Many new videoconference systems nowadays are Flash-based. Of course, the main input for them is some sort of video device (e.g. a webcam). Under Linux, the framework responsible for this is Video4Linux (V4L), of which version 2 (aka V4L2) is current. That means that most recent webcams drivers are supported only by V4L2. Alas, some proprietary editors (of which Skype and Adobe with Flash) still only support V4L1.

This howto describes how to rename a Munin 1.4.x node and/or move it to another domain without losing history, because just renaming the node in /etc/munin/munin.conf will actually just create a new host. It has been tested on Debian Squeeze (would work on Debian Lenny too, at least when using 1.4 backports).

Reference: http://www.cyberciti.biz/tips/recover-mysql-root-password.html (partly copied to avoid loosing source)

# /etc/init.d/mysql stop

Stopping MySQL database server: mysqld.
# mysqld_safe --skip-grant-tables &
[1] 5988
Starting mysqld daemon with databases from /var/lib/mysql
mysqld_safe[6025]: started
# mysql -u root
Welcome to the MySQL monitor.

Let's say you want to install Chamilo on your netbook for a demo... Because Apache uses a lot of memory (and so does MySQL), it is generally considered a good practice to try and use something a bit lighter for your web server This procedure might also work, with a few minor alterations, for OLPC's XO laptops.

Introduction

Imagine you have two servers: on one server, you have a Mercurial repository with all your code, accessible through http. On the other one, you have a working copy of this code that you are using to test a website. Let's call the first server REPOS and the second one DEVEL.

We're preparing a great training course for PHP in Lima (not remote though) that will start in February, exclusively in Spanish and exclusively during the week-end. I'm telling this here because we managed to gather 4 (and possibly 5) of the only 5 Zend certified engineers of Peru to teach it. I'm sure that's going to be a great event. It's going to be a high-level course, so there will be a qualification exam to enter it. If you have developer friends in Peru, pass the word: http://www.dokeoslatino.com/cursos/php

I found a great page that gives a very short an concize manual for using crontabs: http://www.adminschoice.com/docs/crontab.htm

A frequent question I've been asked is why, when installing Dokeos on a local computer, then trying to see it from another computer, the styles are broken (the homepage appears as a list of links from top to bottom). This is all a question of Name Resolution (or DNS).

How you did it

The initial problem lies on how you did the installation on your local computer: you downloaded Dokeos, then took the easy way and installed it on "http://localhost/dokeos/", or "http://127.0.0.1", or even your local IP "http://192.168.0.15" for example.

We have a student working for us on comparisons between various LMSes here, and we recently moved on to Sakai. We've been looking a bit at installing it on an Ubuntu 9.04 and boy... is this a challenge. While there seems to be a few sources of documentation around the web (including on the Sakai website itself) on how to install it, they're all giving a 20 pages-long guide on how to install a specific version of Java (from sources), a specific version of Tomcat (from sources) and a specific version of Sakai (from sources as well).

I've been using GMail for a while now as an SMTP server to send my e-mails from other domains, no matter where I am going. What I realized later is that most of the e-mails I send are getting seen as sent by my account @gmail.com, while I'm actually trying to send them as if they were sent from @dokeos.com. Well, apparently the whole thing is quite compromised.