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The permissions given by the copyleft license are indicated below.
Copyright (c) 2007 2i2L Sarl. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation ; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".
The contents of this tutorial is available under the copyleft license:
In the dynamic of a Free and Open community, any corrections or modifications of this tutorial are welcome at firstname.lastname@example.org.