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The Linux Foundation has become a patent troll
(bladerunner.social)
From Wikipedia, the free encyclopedia
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.
Community icon by Alpár-Etele Méder, licensed under CC BY 3.0
I have rather serious doubts that this is legit. More likely some joker pretending to be from the Linux Foundation sent Redbubble a takedown request.
I agree. Of the 188 marks registered to "The Linux Foundation" with the USPTO, there does not appear to be a mark for "systemd", "fsck", or "segmentation fault." My guess is this is an imposter claim and the artist should counter notice this claim to Redbubble.
FWIW (and assuming the link works) here's the marks ever registered to the Linux Foundation.
https://tmsearch.uspto.gov/bin/showfield?f=toc&state=4808%3Azqagnv.27.1&p_search=searchstr&BackReference=&p_L=500&p_plural=yes&p_s_PARA1=Linux&p_tagrepl%7E%3A=PARA1%24ON&expr=PARA1+and+PARA2&p_s_PARA2=Foundation&p_tagrepl%7E%3A=PARA1%24ON&a_default=search&f=toc&state=4808%3Azqagnv.27.1&a_search=Submit+Query