ERROR 1396 (HY000): Operation ALTER USER failed for ‘root‘@‘localhost‘

1251 client does not support authentication protocol requested by server;consider upgrading Mysql client

ERROR 1396 (HY000): Operation ALTER USER failed for 'root'@'localhost'

先登录mysql
mysql -u root -p

输入密码

mysql> use mysql;

mysql> select user,host from user;

| user | host |
+------------------+-----------+
| root | % |
| admin | localhost |
| mysql.infoschema | localhost |
| mysql.session | localhost |
| mysql.sys | localhost |
| zhangj | localhost |

注意我的 root，host是'%'

你可能执行的是:

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '123';
改成:

ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '123';