GNU General Public License
The GNU General Public License (GPL) is a widely used free software license that guarantees end users the freedom to run, study, share, and modify the software. It is a copyleft license, meaning that derivative works must be distributed under the same license terms, ensuring that the software and its modifications remain free and open. Created by the Free Software Foundation (FSF), it is a cornerstone of the open-source and free software movements.
Developers should learn about the GPL when working on or contributing to open-source projects, as it governs how software can be used, modified, and distributed. It is essential for ensuring compliance in projects that rely on GPL-licensed code, such as Linux kernel contributions or applications built with GPL libraries. Understanding the GPL helps avoid legal issues and supports the ethical distribution of free software.