找出檔案 size = 0 :
> find $dirpath -type f -size 0 -exec ls {} \;
找出檔案 size > 100K
> find $dirpath -type f -size +100k -exec ls {} \;
找出檔案 size > 1M
> find $dirpath -type f -size +1M -exec ls {} \;
找出檔案 size > 1000 Bytes
> find $dirpath -type f -size +1000c -exec ls {} \;
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