Linux is licensed under the terms of the GPL. You are free to view, modify, and distribute the source code, provided that you make your changes available under the GPL as well.
open source
The Linux kernel is licensed under the GPL version 2.
Suse was licensed to Novell.
Linux
Text probably looks a little different from what you are used to in Linux because Linux only uses freely licensed fonts. This means no Arial, no Times New Roman, no Tacoma, etc...
Linux is licensed under the GPL. This means that if you use the kernel in one of your products, you must release any changes that you made. You can use proprietary modules, but these are restricted in what they are allowed to do. Only freely licensed modules can access all features of the kernel.
unix
Two main reasons are it is not Microsoft, so Linux is free and without having to be licensed or registered, as with Windows. And Linux is much more stable and dependable than Windows.
One feature of a Linux web server is high security against threats to the network. Linux is also open source so it's potentially more cost-effective than other options that need to be licensed.
Yes. The Linux kernel and most programs bundled with it are licensed under the GPL, LGPL,or other similar license that permits commercial redistribution, as long as you make the source code available to your customers. If you want to sell copies of a pre-established Linux distro, make sure that it does not bundle programs that prohibit such activity.
Linux Internals is a book about how Linux works.
Linux World is the Linux Development & Training Center
The courses available for Linux include Linux server, Linux desktop, bash shell, and many others.