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Difference between revisions of "GNU General Public License"
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| − | The '''GNU General Public License''' ('''GPL''') is one of the most important documents ever written on a computer. It is to [[Richard Stallman]] as the Ten Commandments is to Moses. | + | The '''GNU General Public License''' ('''GPL''') is one of the most important documents ever written on a computer. It is to [[Richard Stallman]] as the Ten Commandments is to Moses. Any software released under this license respects your [[freedom]] under strong copyleft, though it is not a guarantee the software itself is any good. |
| + | |||
| + | == The four essential freedoms == | ||
| + | According to gnu.org, a program is free software if the program's users have the four essential freedoms: | ||
| + | |||
| + | * The freedom to run the program, for any purpose (freedom 0). | ||
| + | * The freedom to study how the program works, and change it so it does your computing as you wish (freedom 1). Access to the source code is a precondition for this. | ||
| + | * The freedom to redistribute copies so you can help your neighbor (freedom 2). | ||
| + | * The freedom to distribute copies of your modified versions to others (freedom 3). By doing this you can give the whole community a chance to benefit from your changes. Access to the source code is a precondition for this. | ||
| + | |||
| + | == External links == | ||
| + | * [http://www.gnu.org/copyleft/gpl.html GNU General Public License] on gnu.org | ||
[[Category:Free licenses]] | [[Category:Free licenses]] | ||
Revision as of 19:55, 16 February 2014
The GNU General Public License (GPL) is one of the most important documents ever written on a computer. It is to Richard Stallman as the Ten Commandments is to Moses. Any software released under this license respects your freedom under strong copyleft, though it is not a guarantee the software itself is any good.
The four essential freedoms
According to gnu.org, a program is free software if the program's users have the four essential freedoms:
- The freedom to run the program, for any purpose (freedom 0).
- The freedom to study how the program works, and change it so it does your computing as you wish (freedom 1). Access to the source code is a precondition for this.
- The freedom to redistribute copies so you can help your neighbor (freedom 2).
- The freedom to distribute copies of your modified versions to others (freedom 3). By doing this you can give the whole community a chance to benefit from your changes. Access to the source code is a precondition for this.
External links
- GNU General Public License on gnu.org
