I have found a web site which is very useful for a user who need to administration Debian Linux which is :

Debian-Administration.org

This is a simple weblog which is designed to contain interesting and useful information related to the System Administration of Debian GNU/Linux systems.

Whilst there are several sites where users can post questions and have answers contributed by other users there are no other sites on the web which are specifically targetted at distributing articles of interest to Debian administrators.

It is highly recommand to all of you.

K. M. Lau