what does it mean a red filename shown with black background?

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Chapters
00:00 Question
00:42 Accepted answer (Score 24)
01:22 Answer 2 (Score 3)
01:46 Thank you

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Full question
https://superuser.com/questions/543397/w...

Question links:
[What does it mean for the file name to be shown with red background]: https://superuser.com/q/202783/193693

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Tags
#bash #shell #ls

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