mysql 问题之 ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password)

1.问题描述

一般这个错误信息是密码错误引起,
因此需要重置密码

2.重置密码

2.1 跳过Mysql的密码认证

重置密码的第一步就是跳过MySQL的密码认证过程，方法如下

[root@izwz91h49n3mj8r232gqwez ~]# vim /etc/my.cnf
加入在 [mysqld]一栏下面加入一行
skip-grant-tables
如下图

2.2 重启一下Mysql服务

[root@izwz91h49n3mj8r232gqwez etc]# service mysqld restart
Redirecting to /bin/systemctl restart  mysqld.service

2.3 修改密码

[root@izwz91h49n3mj8r232gqwez etc]# mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.6.41 MySQL Community Server (GPL)

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> use mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql>  update user set password=password("root") where user="root";
Query OK, 0 rows affected (0.00 sec)
Rows matched: 5  Changed: 0  Warnings: 0

mysql>  flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> quit

到这里 ,root账户就已经重置成新的密码;

2.3 编辑my.cnf,去掉刚才添加的内容，然后重启MySQL

[root@izwz91h49n3mj8r232gqwez etc]# vim my.cnf
如下图 注释掉一行
skip-grant-tables

2.4 重启服务—使得密码登录生效

[root@izwz91h49n3mj8r232gqwez etc]# service mysqld restart
Redirecting to /bin/systemctl restart  mysqld.service

3.再次连接成功