The Linux kernel and the GNU/Linux system
in english
* http://en.wikipedia.org/wiki/Linux
* http://en.wikipedia.org/wiki/LAMP_%28software_bundle%29
* http://www.kroah.com/lkn/
in french
* http://www.zdnet.fr/actualites/20-ans-de-linux-les-grandes-dates-en-images-39759863.htm
* http://www.system-linux.eu/
* http://framabook.org/unix-pour-aller-plus-loin-avec-la-ligne-de-commande