GeneralThis forum is for non-technical general discussion which can include both Linux and non-Linux topics. Have fun!
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Introduction to Linux - A Hands on Guide
This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.
Click Here to receive this Complete Guide absolutely free.
PLEASE NOTE: All LQ Rules apply to the General forum. Flame wars, personal attacks, hostility, insults and behavior of that nature will not be tolerated. Differing opinions are one of the things that make this site great, but to benefit from differing opinions the discourse must happen respectfully and thoughtfully... without insult and personal attack. Members who are unable or unwilling to participate in General under those parameters will not be permitted to do so. If you see behavior of this nature please report it.
With Qt library you can develop opensource without paying the license. If you want to develop commercial application, you have to pay the license....
Ok, what about this:
I want to develop commercial applications using Qt. So to avoid paying the license, I make it opensource. But I sell it to company, people, government ( you name it ). I forbid every one to use my program without paying money to me but my program is opensource. Is this possible? Is this legal?
Originally posted by aizkorri well, then you are coding a commercial open source application,
I don't see why an open source app cannot be commercial, All the time you sell it with the source code.
So according to you, except for forbidding people for using my program free of charge, it is legal to code opensource commercial application without paying the license. Well, maybe the only downside for this style is everyone can download the source dan build it, then use my program without paying money to me. And they can sell it to others.
But the idea is that you don't make money by selling the app, you make money by selling manuals, technical support, and nice box sets that save people the bother of compiling it themselves. This is how the commercial distributions work.
And if you fear that you will lose out significantly if a competitor undercuts you on price by stealing your work, then you can just buy a qt dev license from Trolltech and release your product closed source.
Just put a copyright in your code and don't use the GPL.
It's important to differentiate between open source development and open source distribution. An open source development project is owned by the community. If you chose to openly distribute your individual work as source code however, you still own it and RMS can't stop you from placing whatever restrictions you like on it. The GPL borrowed the open distribution aspect of shareware licenses and added the community development model to it (the bazaar.)
As to Qt, if you intend to distribute their libraries with your commercial app, you should pay them their money.
I think an important distinction that many are missing here is that the GPL is an open source license. However, it's by no means the only open source license. Open source doesn't necessarily mean GPL, or free as in beer...
Distribution: K/Ubuntu 12.04/14.04, Scientific Linux 6.3/6.4, Android-x86, Pretty much all distros at one point...
Shade is correct. You can have an open source license that is different from the GPL. You can also have open source licenses which are commercial and restrict re-distribution (even to the point of it being only transferable to a person who buys the license,... don't know how you'd enforce that though). Doing that may make it incompatible with other licenses though. Open Source means you can look at the source code (to modify it, etc.). It doesn't neccesarily mean that you must give away the program.
You can also have free software that is closed source. Many libraries are essentially commercial, proprietary programs that you can give away under certain conditions.
The following is a quote from qgpl of wich the free trolltech component is licend under, oh it is a split license, the other license is GPL
"a. You must ensure that all recipients of machine-executable forms of these items are also able to receive and use the complete machine-readable source code to the items without any charge beyond the costs of data transfer.
b. You must explicitly license all recipients of your items to use and re-distribute original and modified versions of the items in both machine-executable and source code forms. The recipients must be able to do so without any charges whatsoever, and they must be able to re-distribute to anyone they choose. "
So no you can not horde the software without paying a license to trolltech.
If you choose to keep you software no libre then the price (for a single developer) is :
$ 1550 professional Edition
$ 2490 Enterprise Edition