hello everybody,

i need a free e-book that is not copyrighted at all so that i can use it as a course material

For Linux? This one is copylefted.

Rute User's Tutorial and Exposition

copylefted nice but with sorrow it is copyrighted

TERMS AND CONDITIONS
1. This work may not be reproduced in hard copy except for personal use. Further, it may not be reproduced in hard copy for training material, nor for commercial gain, nor for public or organisation-wide distribution. Further, it may not be reproduced in hard copy except where the intended reader of the hard copy initiates the process of converting the work to hard copy.


u can see them at http://www.icon.co.za/~psheer/book/copying.html.gz


and i need to use it as a course material where i teach it

Just let the students print their own copy or view it on a computer. Then it's perfectly legal and encouraged.

Don't students have to purchase their own books? Any course I took required me to supply my own book. Former students would sell used copies if they didn't want to keep it.