ubantu mysql无法远程连接问题

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1、我们先看看，常规套路：

mysql -u root -p

mysql> update user set host = '%' where user = 'root';

/etc/init.d/mysqld restart

一般来说，以上就应该够了。（可能有些要关防火墙）

但ubantu：18.04+mysql：5.7就不行了，还得用几招。

2、查看/etc/mysql/my.cnf 内容，如与以下不符，直接替换

root@ubuntu:~# cat /etc/mysql/my.cnf 
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
# bind-address           = 127.0.0.1
 

3、修改密码

ALTER USER 'root'@'%' IDENTIFIED BY 'pwd' PASSWORD EXPIRE NEVER;
ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY 'pwd';
FLUSH PRIVILEGES;

4、OK了