Ubuntu升级到20.04后，对用户'root'@'localhost'的访问被拒绝（使用密码：是）被拒绝

Question

将Ubuntu从18.04升级到20.04后，我无法访问我们的系统。我得到Access Denied denied for user 'root'@'localhost' (using password: yes)。我尝试使用mysql -u root -p，输入密码后可以连接，但是使用mysql -u root -h 127.0.0.1时出现错误access denied。

只需添加，数据库中就有3个root用户，如下所示：

+------------------+-----------------+
| user             | host            |
+------------------+-----------------+
| remote           | %               |
| root             | 127.0.0.1       |
| root             | ::1             |
| debian-sys-maint | localhost       |
| mysql.session    | localhost       |
| mysql.sys        | localhost       |
| phpmyadmin       | localhost       |
| remote           | localhost       |
| root             | localhost       |
+------------------+-----------------+

Answer 1

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'YOURPWD';