April 2017
Beginner
504 pages
14h 11m
English
The license is an important question as not all free software is free for all uses. Some of the licenses allow free use for hobby projects and education but require you to purchase the software for professional, profit-oriented use.
The most widely used licenses and their explanation (and the whole text of the license) is available on the web page of the Open Source Initiative (https://opensource.org/licenses). It lists nine different licenses, and to make the situation a bit more complex, these licenses have versions.
One of the oldest licenses is the General Public License (GPL) standing for GNU. This license contains the following sentences:
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