Is open source software copyrighted?

Is open source software copyrighted?

Open source is simply a license to use and modify the software under the terms of the open source software agreement. It is still protected by copyright, but you have a license to use it provided you follow the terms of the agreement.

Is it illegal to sell open source software?

Absolutely. All Open Source software can be used for commercial purpose; the Open Source Definition guarantees this. You can even sell Open Source software.

Is it legal to profit from open source software?

Do I need to license a library under the GPL?

Yes, because the program actually links to the library. As such, the terms of the GPL apply to the entire combination. The software modules that link with the library may be under various GPL compatible licenses, but the work as a whole must be licensed under the GPL.

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Can I distribute a modified version of a project under the GPL?

No. The GPL says that your modified versions must carry all the freedoms stated in the GPL. Thus, anyone who receives a copy of your version from you has the right to redistribute copies (modified or not) of that version. You may not distribute any version of the work on a more restrictive basis.

Will you make an exception for a GNU program under the GPL?

Using a certain GNU program under the GPL does not fit our project to make proprietary software. Will you make an exception for us? It would mean more users of that program. If a programming language interpreter is released under the GPL, does that mean programs written to be interpreted by it must be under GPL-compatible licenses?

Can You incorporate GPL-covered software into a proprietary system?

You cannot incorporate GPL-covered software in a proprietary system. The goal of the GPL is to grant everyone the freedom to copy, redistribute, understand, and modify a program. If you could incorporate GPL-covered software into a nonfree system, it would have the effect of making the GPL-covered software nonfree too.

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