Login error following modifications:
mysql-8.0.13 ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
First, change the root password
mysql> update mysql.user set authentication_string="123456" where user="root";
或：mysql>update mysql.user set authentication_string="123456" where user="root" and host='localhost';
# Refresh permission (must step)
mysql> flush privileges;
# Query whether the password to take effect:
mysql> select host,user,authentication_string from mysql.user;
mysql-8.0.13 After the change password mysql> quit to log in again.
>mysql - u root -p
password:123456
报错：ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
To find a solution:
1, cmd-1 Window: No password start mysql service
mysqld --console --skip-grant-tables --shared-memory；
# - skip-grant-tables means that the time to start MySQL service permission to skip the authentication table.
# No password start mysql service
2, no password, change your password again.
To open a CMD window (before a CMD window can not move), go to the mysql \ bin directory
>mysql -u root -p
-> Enter the password does not directly enter
No password mysql service
# Change Password is empty
mysql>UPDATE mysql.user SET authentication_string='' WHERE user='root';
mysql>flush privileges;
myslq>quit
# No login password again
>mysql - u root -p
Enter password:
#enter not enter a password to enter mysql
------------------------------------------------------------------------------------
Query online information, may be caching_sha2_password problem MySQL8.0, and try again
MySQL8.0 adopt a new, more secure authentication method, the original method to change the password to change the password can not log on after
mysql>update mysql.user set authentication_string="123456" where user="root" and host='localhost';
The right to change the root password:
1, first query the user
mysql> select host,user,plugin,authentication_string from mysql.user;
2, change passwords and encryption scheme
mysql>ALTER user 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '123456';
mysql> flush privileges;
3、退出再次登录，成功。
。
或者也可以修改密码后再修改plugin
1、mysql>update mysql.user set authentication_string="123456" where user="root" and host='localhost';
2、mysql> UPDATE mysql.user SET plugin='mysql_native_password' WHERE user='root';
具体步骤：windows-mysql无法登录，修改密码
1、首先关闭正在运行的MySQL服务。
2、打开CMD窗口，转到mysql\bin目录。
3.、输入mysqld --console --skip-grant-tables --shared-memory；。--skip-grant-tables 的意思是启动MySQL服务的时候跳过权限表认证。
4、再开一个CMD窗口（前一个窗口已经不能动了），转到mysql\bin目录。
5. 输入mysql -u root -p回车，出现MySQL提示符 >。
6. 进行修改密码：
ALTER user 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '123456';
#plugin需要改成：mysql_native_password
7. 刷新权限（必须步骤）：flush privileges; 。
8. 退出 quit。
9. 再次访问，使用用户名root和新密码123456登录。
主要语句：
#启动mysql服务 net start mysql
#停止mysql服务 net stop mysql
#登录mysql mysql -u root -p
#查询用户信息
mysql> select host,user,plugin,authentication_string from mysql.user;
#修改密码：
mysql >ALTER user 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY it'123456';
#退出 mysql>quit
作者：Helen_宁儿
链接：https://www.jianshu.com/p/414749284d70
来源：简书
简书著作权归作者所有，任何形式的转载都请联系作者获得授权并注明出处。
