https://blog.faceutil.com/2017/04/30/fastboot-%eb%b3%b8%eb%ac%b8-%ea%b8%80-%ec%8b%9c%ec%9e%91-%ec%9c%84%ec%b9%98%ec%99%80-%ec%83%81%eb%8b%a8-%ec%95%a0%eb%93%9c%ec%84%bc%ec%8a%a4-%ec%9c%84%ec%b9%98%ea%b0%80-%eb%8b%ac%eb%9d%bc%ec%a7%80/