Some of these documents are used in our training sessions. They are available under the Creative Commons BY-SA license (see details and other documents).
Here are the PDF versions:
Here are the source versions in OpenDocument Format:
Thanks to people who sent comments and corrections: Michael Kerrisk, Jim Donelson, Tyler Le, Laurent Thomas, Jeff Ghislain, Leif Thande, Frédéric Desmoulins, Przemysław Ciesielski
