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.
Some private small stores do sell computers with Linux installed. Linux is in its original idea free for all and easy to download from official pages. An easy to use Linux version that is user friendly, to new users, is Ubuntu
Completely free. If someone sells you Linux, it is legitimate, however, it will not be for a license to use the software. The GPL is not that kind of license. However, it is still free as in freedom, not free as in beer, meaning it is entirely valid under the GPL to sell Linux.
Linux PreLoaded is a UK website that sells desktop computers. They have decent prices, plus the Linux computers have great ratings already in 2013. They ship from the UK.
There are several commercial Linux distributions that sell licenses and media, as well as a few CDs that sell copies of non-commercial ones at a low cost. Below are links to several of the major commercial distributions and where to purchase them.
Nothing. The GPL is not a license you purchase. It is legal to sell Linux distributions, but most (Except for Red Hat Enterprise and a few others.) don't cost a thing and are free to download.
They can't make profit from their products because 80% of the Linux distributions don't sell it. Linux distribution take volunteers that want to do it because they love programming and problem solving, and the volunteers don't do it for cash, they do it for fun, but although some money is made by donations and ads on their site.
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.
One can obtain the latest Linux news on websites such as CRN, Linux Today or Distro Watch. One can also find news about Linux on Arch Linux and Linux Journal.
No, it is unix-based but Linux is a kernel not an operating system.Ubuntu,Linux Mint,Debian,and puppy Linux,ect. are OS's that use the Linux kernel.
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