What is the meaning of kill %1

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Music by Eric Matyas
https://www.soundimage.org
Track title: Switch On Looping

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Chapters
00:00 Question
00:20 Accepted answer (Score 28)
01:27 Answer 2 (Score 9)
02:05 Thank you

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Full question
https://superuser.com/questions/317153/w...

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Tags
#linux #ubuntu1004

#avk47