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oldCachesandbadSnapshotetc. It will also break on the (unlikely) case of filenames with newlines and the (much likelier) case of filenames with spaces. It will also fail on cases where you have files whose name starts with a-.foo bar" baz. If you want to make it really safe, you needfind . -type f -print0 | xargs -0 rmor similar constructs. In any case, this does not help the main problem which is that you are not checking in the right places sincegrep Cacheswill match any file whose name or path containsCachesanywhere.grep '\/Caches\/'and so on then your concern is also considered.