GNU General Public License v2.0
The GNU GPL is the most widely used free software license and has a strong copyleft requirement. When distributing derived works, the source code of the work must be made available under the same license. There are multiple variants of the GNU GPL, each with different requirements.
Instructions
Create a text file (typically named LICENSE or LICENSE.txt) in the root of your source code and copy the text of the license into the file.
Terms
Permissions
Commercial Use
Modifications
Distribution
Private Use
Limitations
Liability
Warranty
Conditions
Include Copyright
Document Changes
Disclose Source
Same License