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

Have questions about possible violations of GNU licenses? We have answers! Check out all the questions and answers on our FAQ page at https://u.fsf.org/3kx #GNU #GPL #freesoftware #softwarefreedom #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 someone steals a CD containing a version of a GPL-covered program, does the GPL give the thief the right to redistribute that version?" The answer is somewhat complicated. Read the full answer at https://u.fsf.org/3kv #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

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 someone steals a CD containing a version of a GPL-covered program, does the GPL give the thief the right to redistribute that version?" The answer is somewhat complicated. Read the full answer at https://u.fsf.org/3kv #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

How do I use GNU licenses for my own software? We are glad you asked! Please see our "GPL how to" page for the full answer and thank you for making the ethical choice! https://u.fsf.org/2b5 #softwarefreedom #freesoftware #GNUGPLFAQ

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

"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

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

"If someone steals a CD containing a version of a GPL-covered program, does the GPL give the thief the right to redistribute that version?" The answer is somewhat complicated. Read the full answer at https://u.fsf.org/3kv #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

"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 #GNUGPLFAQ https://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

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

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 GPL FAQ: https://u.fsf.org/3tx #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

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