https://blog.faceutil.com/2017/04/21/%ec%9c%88%eb%8f%84%ec%9a%b0-hosts-%ed%8c%8c%ec%9d%bc-%eb%b3%80%ec%a1%b0-%eb%b0%9c%ec%83%9d-hosts-%ed%8c%8c%ec%9d%bc%ec%88%98%ec%a0%95-%eb%b3%b5%ec%9b%90-%eb%b0%8f-%ed%95%b4%ea%b2%b0%ed%95%98/