UNIX
find
https://qiita.com/tomozo6/items/5646d6a062950f986372
https://uxmilk.jp/8583
xargs
https://www.google.com/search?q=xargs&oq=xargs&aqs=chrome..69i57.1780j0j7&sourceid=chrome&ie=UTF-8
https://wa3.i-3-i.info/word11619.html
https://orebibou.com/ja/home/201507/20150727_001/
https://qiita.com/chanreo/items/cdfbd4b8cddeb1cb7117
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