At the FSF, the licensing team is often asked, "What is the difference between an 'aggregate' and other kinds of 'modified versions'?" Read the answer on our #GNUGPLFAQ: https://u.fsf.org/3tx
What if I discover a possible violation of the GPL? "You should report it. First, check the facts as best you can. Then tell the publisher or copyright holder of the specific GPL-covered program." Read the full answer https://u.fsf.org/3ks#GNUGPLFAQ
"If I use a piece of software that has been obtained under the GNU GPL, am I allowed to modify the original code into a new program then distribute and sell that new program commercially?" Read the full answer on our #GNUGPLFAQhttps://u.fsf.org/3we
"What if my school might want to make my program into its own proprietary software product?" Read the suggestion on our #GNUGPLFAQhttps://u.fsf.org/3un
How do I upgrade from (L)GPLv2 to (L)GPLv3? "First, include the new version of the license in your package. [..] Second, replace all your existing v2 license notices [...]" Read the full answer at https://u.fsf.org/3kw#GNUGPLFAQ
"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 [...]" Read the full answer: https://u.fsf.org/3kz#GNUGPLFAQ
FAQ: (NOT LEGAL ADVICE) "You can legally use the GPL terms (possibly modified) in another license provided that you call your license by another name and do not include the GPL preamble[...]" Read full answer at https://u.fsf.org/3ky#GNUGPLFAQ
Why GPL? "Using the GNU GPL will require that all the released improved versions be free software. This means you can avoid the risk of having to compete with a proprietary modified version of your own work." More at https://u.fsf.org/3kr#GNUGPLFAQ
When is a program and its plug-ins considered a single combined program? "It depends on how the main program invokes its plug-ins. [...] Read the full answer: https://u.fsf.org/3tj#GNUGPLFAQ
Many people ask, "Can you sell free software?" The answer is "Yes, the GPL allows everyone to do this. The right to sell copies is part of the definition of free software." Read the full answer at https://u.fsf.org/3kq#GNUGPLFAQ
Why GPL? "Using the GNU GPL will require that all the released improved versions be free software. This means you can avoid the risk of having to compete with a proprietary modified version of your own work." More at https://u.fsf.org/3kr#GNUGPLFAQ
Can I have a GPL-covered program and an unrelated nonfree program on the same computer? "Yes." <-- That's it! That's the full answer. Read it on gnu.org and check out other FAQ answers at https://u.fsf.org/3ku#GNUGPLFAQ
Does the #GPL require that source code of modified versions be posted to the public? "The GPL does not require you to release your modified version, or any part of it. You are free to [...]" Read the full answer at https://u.fsf.org/3kt#GNUGPLFAQ
Why GPL? "Using the GNU GPL will require that all the released improved versions be free software. This means you can avoid the risk of having to compete with a proprietary modified version of your own work." More at https://u.fsf.org/3kr#GNUGPLFAQ
"If I use a piece of software that has been obtained under the GNU GPL, am I allowed to modify the original code into a new program then distribute and sell that new program commercially?" Read the full answer on our #GNUGPLFAQhttps://u.fsf.org/3we
How do I upgrade from (L)GPLv2 to (L)GPLv3? "First, include the new version of the license in your package. [..] Second, replace all your existing v2 license notices [...]" Read the full answer at https://u.fsf.org/3kw#GNUGPLFAQ
Does the #GPL require that source code of modified versions be posted to the public? "The GPL does not require you to release your modified version, or any part of it. You are free to [...]" Read the full answer at https://u.fsf.org/3kt#GNUGPLFAQ
Why GPL? "Using the GNU GPL will require that all the released improved versions be free software. This means you can avoid the risk of having to compete with a proprietary modified version of your own work." More at https://u.fsf.org/3kr#GNUGPLFAQ
"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 [...]" Read the full answer: https://u.fsf.org/3kz#GNUGPLFAQ
"If I use a piece of software that has been obtained under the GNU GPL, am I allowed to modify the original code into a new program then distribute and sell that new program commercially?" Read the full answer on our #GNUGPLFAQhttps://u.fsf.org/3we
What does it mean to say a license is "compatible with the GPL?" It means [...] you can combine code released under the other license with code released under the GNU GPL in one larger program. Read the full answer: https://u.fsf.org/3u6#GNUGPLFAQ
FAQ: (NOT LEGAL ADVICE) "You can legally use the GPL terms (possibly modified) in another license provided that you call your license by another name and do not include the GPL preamble[...]" Read full answer at https://u.fsf.org/3ky#GNUGPLFAQ
FAQ: (NOT LEGAL ADVICE) "You can legally use the GPL terms (possibly modified) in another license provided that you call your license by another name and do not include the GPL preamble[...]" Read full answer at https://u.fsf.org/3ky#GNUGPLFAQ
How do I upgrade from (L)GPLv2 to (L)GPLv3? "First, include the new version of the license in your package. [..] Second, replace all your existing v2 license notices [...]" Read the full answer at https://u.fsf.org/3kw#GNUGPLFAQ
FAQ: (NOT LEGAL ADVICE) "You can legally use the GPL terms (possibly modified) in another license provided that you call your license by another name and do not include the GPL preamble[...]" Read full answer at https://u.fsf.org/3ky#GNUGPLFAQ