mysql 数据库密码忘记重置 进行远程连接

Mysql忘记密码

Mysql忘记密码背景镜像服务环境Mysql版本 现象 解决办法查看mysql是否启动暂停服务修改配置文件修改密码！关键重启服务重新连接允许远程连接（客户端连接）

---

背景

由于好久之前安装的数据库，密码忘记了（改进方案：最好记录在自己的密码记事本），导致登录不了。

镜像服务环境

Linux

Mysql版本

5.7.22

现象

拒绝用户root访问，请使用正确的密码奥。

[root@iz2zeezkmfgg9patbo38hmz ~]# mysql -uroot -p
Enter password: 
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

解决办法

查看mysql是否启动

[root@iz2zeezkmfgg9patbo38hmz bin]# ps -ef | grep  mysql
root      4500     1  0 07:24 pts/0    00:00:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/usr/local/mysql/data --pid-file=/usr/local/mysql/data/iz2zeezkmfgg9patbo38hmz.pid
​
mysql     4669  4500  0 07:24 pts/0    00:00:03 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/usr/loc
al/mysql/logs/mysqld.log --pid-file=/usr/local/mysql/data/iz2zeezkmfgg9patbo38hmz.pid --socket=/usr/local/mysql/mysql.sockroot      5464  1575  0 07:47 pts/0    00:00:00 grep --color=auto mysql

暂停服务

systemctl stop mysqld.service

修改配置文件

vi /etc/my.cnf
# 在[mysqld]下添加  跳跃密码认证
skip-grant-tables

修改密码！关键

# 启动服务
systemctl start mysqld.service 
# 进入数据库
mysql -u root 
# 使用mysql数据库 
mysql> use mysql;
# 修改数据库信息
mysql> update mysql.user set authentication_string=password('0000') where user='root';
Query OK, 1 row affected, 1 warning (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 1
 # 刷新权限认证
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
 
mysql> exit

重启服务

systemctl restart mysqld.service

重新连接

mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 12
Server version: 5.7.22 Source distribution
​
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> 

允许远程连接（客户端连接）

mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '0000';