Linux is free software. Red Hat doesn't pertain to all Linux. Red Hat does this because it's allowed by GPL. There are also "libre" versions of the Linux kernel which replaces all proprietary additions to the kernel (which do not make the kernel non-free in anyway, more of a matter of morales).
and the free versions dont pertain to all of linux. i understand why its allowed to sell it, but its still selling it. so a more correct version would be most distros of linux are free
and the free versions dont pertain to all of linux. i understand why its allowed to sell it, but its still selling it. so a more correct version would be most distros of linux are free
CentOS is a free build of Red Hat Linux because you cannot refuse changes from the Linux kernel from the public per the GPL license.
Also, you should check out https://kernel.org/#, where the Linux source is kept in a public, free location for anyone who can afford the bandwidth to download, change, distribute, and use.
EDIT: There should be a URL code so I don't have to add hashtags at the end of my URLs to keep appropriate grammar.
Okay, GNU userland is also completely free. Xorg is also completely free. Almost every popular DE is completely free (exceptions...?). Fedora is a Linux OS that is completely against non-free software and anything that requires royalties (such as the MP3 format). As such it has none (except for a few exceptions concerning device support).
http://www.gnu.org/philosophy/free-sw.html
Freedom to distribute (freedoms 2 and 3) means you are free to redistribute copies, either with or without modifications, either gratis or charging a fee for distribution, to anyone anywhere.