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,

You probably know we have the automated tests in Chamilo 1.8.8 LMS (a few thousands, actually), that guarantee a better quality of delivery. But sometimes you might wonder how to actually run those tests, so you can be an official Chamilo tester too.

How to run the tests

The short answer is you only have to run one command (and you might even load a page in your browser). The long answer, however, is quite longer.

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.

One of our customers has Apache logs (Xampp-based) full of this line:

[Tue Mar 02 16:21:41 2010] [info] [client 172.20.99.16] (OS 10054)Une connexion existante a dû être fermée par l'hôte distant.  : core_output_filter: writing data to the network

Sometimes (OS10053) is used as a variant, but the Apache error seems to be the same (core_output_filter: writing data to the network) Apparently, the error is widespread and only occurs on Windows operating system (that's where OS10054 error code comes from) and a few useful references for this are:

• http://httpd.apac

I just discovered jsfiddle.net. It's a website that lets you type (or paste) HTML, CSS and JS code and load a specific JavaScript library to test its effects live. It also gives you a "JSLint" link which checks the syntax of your JavaScript. Great tool for web developers doing occasional JavaScript coding!

Introduction: what are you talking about ?

Ok so let me explain this long title a little bit more. We have various Drupal sites: let's call one the hub and the other ones the clients.

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.

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"]

Dear all, As this is my first post as an official member of the Chamilo community please allow me to introduce myself, I am Cedric and I am currently in charge of Business Development at BeezNest. Today was the first day of the AELF show at CNIT, Paris (www.aelf.fr), which I attended.

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.