Asustor AS-602T - Příručka (Stránka 51)

ASUSTOR NAS User Guide
51 / 60
9. GNU General Public License
GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> Everyone is permitted to
copy and distribute verbatim copies of this license document, but changing it is not allowed.
Preamble
The GNU General Public License is a free, copyleft license for software and other kinds of works.
The licenses for most software and other practical works are designed to take away your
freedom to share and change the works. By contrast, the GNU General Public License is
intended to guarantee your freedom to share and change all versions of a program--to make
sure it remains free software for all its users. We, the Free Software Foundation, use the GNU
General Public License for most of our software; it applies also to any other work released this
way by its authors. You can apply it to your programs, too.
When we speak of free software, we are referring to freedom, not price. Our General Public
Licenses are designed to make sure that you have the freedom to distribute copies of free
software (and charge for them if you wish), that you receive source code or can get it if you
want it, that you can change the software or use pieces of it in new free programs, and that you
know you can do these things.
To protect your rights, we need to prevent others from denying you these rights or asking you
to surrender the rights. Therefore, you have certain responsibilities if you distribute copies of
the software, or if you modify it: responsibilities to respect the freedom of others.
For example, if you distribute copies of such a program, whether gratis or for a fee, you must
pass on to the recipients the same freedoms that you received. You must make sure that they,
too, receive or can get the source code. And you must show them these terms so they
know their rights.
Developers that use the GNU GPL protect your rights with two steps:
(1) assert copyright on the software, and (2) offer you this License giving you legal permission
to copy, distribute and/or modify it.
For the developers' and authors' protection, the GPL clearly explains that there is no warranty
for this free software. For both users' and authors' sake, the GPL requires that modified
versions be marked as changed, so that their problems will not be attributed erroneously to
authors of previous versions.
Some devices are designed to deny users access to install or run modified versions of the
software inside them, although the manufacturer can do so. This is fundamentally incompatible
with the aim of protecting users' freedom to change the software. The systematic pattern of
such abuse occurs in the area of products for individuals to use, which is precisely where it is
most unacceptable. Therefore, we have designed this version of the GPL to prohibit the practice
for those products. If such problems arise substantially in other domains, we stand ready to
extend this provision to those domains in future versions of the GPL, as needed to protect the
freedom of users.