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Nonfree software found in GNU Boot releases again, many distros affected.
(savannah.gnu.org)
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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Clarify the part where you said it's like when you were back in college.
The hard part here is that while you get a chance to restate your point, readers may already expect this one to sound belittling and you'll have to try harder so this one also doesn't sound like you're calling people naive.