GNU是一个操作系统，其内容软件完全以GPL方式发布。这个操作系统是GNU计划的主要目标，名称来自GNU'sNotUnix!的递归缩写，因为GNU的设计类似Unix，但它不包含具著作权的Unix代码。GNU的创始人，理查德·马修·斯托曼，将GNU视为“达成社会目的技术方法”。
This program is free software you can redistribute it and/or modify it under the terms of the GNU General Public Licens...
This program is free software you can redistribute it and/or modify it under the terms of the GNU General Public Licens...
This program is free software you can redistribute it and/or modify it under the terms of the GNU General Public Licens...
This program is free software you can redistribute it and/or modify it under the terms of the GNU General Public Licens...
The manual of GNU linker, LD. It is hard to find a pdf version of this document....