The material on this wiki is released under the Creative Commons Attribution-ShareAlike 3.0 License.
You are therefore free to share and adapt the material, provided that you do so under the same or similar license, and that you give credit to the original authors.
The full text of the license can be found on the Creative Commons website.
When attributing, it is sufficient to refer to the authors of the wiki as a whole rather than individually, so "Contributors to the Ubuntu documentation wiki", although you should check the relevant page in case any specific attributions are required.
For information on why we have chosen this license, please see WikiLicensing.