Client does not support authentication protocol requested by server;consider upgrading mysql client
解决方法:
启动:mysql 8.0 command line client
之后输入下面的代码即可。
use mysql;
ALTER USER ‘root‘@‘localhost‘ IDENTIFIED WITH mysql_native_password BY ‘123qwe!@#‘;
FLUSH PRIVILEGES;
原文：http://blog.51cto.com/13772470/2121518