https://blog.toright.com/posts/1459/%e9%a2%a8%e9%9b%b2%e8%ae%8a%e8%89%b2%e4%b9%8b-linux-%e6%aa%94%e6%a1%88%e8%aa%a4%e5%88%aa%e6%95%91%e6%8f%b4
風雲變色之 Linux 檔案誤刪救援