Documentation

A very useful resource (in French) to use SSH, with specific use cases: Les_tunnels_SSH Another useful (and short one for tunneling): http://www.howtoforge.com/reverse-ssh-tunneling

Connecting to another remote computer through a common central computer

In short, if you have a configuration with 3 computers (A - B - C) and you want to connect to A (arrival) from C (client) but A doesn't allow direct SSH connection, you can do the following:

1. On A and B, install openssh-server
2. On A,

Migrations on production systems is one of the most complex thing there is in the field of software because it requires all-in-one system administration, database administration, software development and quality management, each at a high level of skill. We generally delegate  a certain level of quality management to the customer (because they're most qualified in telling us what's wrong) but all the other aspects have to be dealt with, without the smallest mistake, otherwise you don't get a running system in the end.

This might come in handy some time http://dev.opera.com/articles/view/css-only-scrollable-timeline-2/ [caption id="" align="aligncenter" width="640" caption="CSS only timeline allows this kind of thing"]

For some reason I find myself having to work with CentOS a lot these days. I hate to say I hate something, but I can't help saying I don't like CentOS at all.

This command is to be improved progressively... sudo apt-get install apache2 libapache2-mod-php5 mysql-server mysql-client php5-mysql php5-xcache php5-gd php5-xdebug screen phpmyadmin php5-imagick mercurial git php-pear php5-dev

The documentation to install BigBlueButton 0.64 on CentOS (and on most other distributions) is really excellent. However, I found that CentOS 5.5 had not been documented yet, so I tried it and run into a few problems. I explain below how to get it all sorted out. I installed CentOS5.5 from a DVD in "server" mode, so without graphical interface.

There's a short but great article about setting up PHPEclipse with Xdebug here: http://bogdan-albei.blogspot.com/2010/06/php-remote-debugging-with-xdebug-and.html I really don't want to forget this one!

There's a nice article about open-source tools for e-learning on one of the blogs around eFront (another open-source LMS) http://blog.efrontlearning.net/2010/10/open-source-authoring-tools-for-e.html

I figured this little trick could be useful to some of you. In the common situation of having to hire a subcontractor to execute one task inside a big project in Redmine, you might want to give him access to just one task and leave the project otherwise untouched.

To respect the wishes of the trademark holder, Dok€os(TM) is not mentioned by its true trademark in the article below, and will simply be replaced by "Dok".