https://www.kernel.org/doc/html/latest/process/license-rules.html https://www.kernel.org/doc/html/latest/process/license-rules... https://www.gnu.org/licenses/

https://www.kernel.org/doc/html/latest/process/license-rules.html https://www.kernel.org/doc/html/latest/process/license-rules... https://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html https://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html