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First, -exec is a bad way to do this. It will have to fork/exec a copy of rm once for each file to be deleted, which is extraordinarily slow under Cygwin. Use xargs instead:
find . -name db\* -mtime +2 -type f -print0 | xargs -0 rm
This will result in rm being called only once with all the filenames to delete as arguments (unless the total length is too great to fit on one command line, in which case rm will be called as many times as necessary, but still much less than once per file.)
-- Owen Rees Hewlett Packard Laboratories, Bristol, UK
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