環(huán)境：linux;mysql5.7

mysql密碼忘記：

[root@izwz9f40l0qo5cpnn8qwmpz ~]# mysql -u root -p

Enter password:

ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

查看當(dāng)前版本：

# rpm -qa |grep mysql

mysql57-community-release-el7-7.noarch

mysql-community-client-5.7.20-1.el7.x86_64

mysql-community-libs-5.7.20-1.el7.x86_64

mysql-community-common-5.7.20-1.el7.x86_64

mysql-community-server-5.7.20-1.el7.x86_64

停止mysql服務(wù)：

# service mysql stop

Shutting down MySQL.. SUCCESS!

使用?mysqld_safe --skip-grant-tables:(啟動(dòng)時(shí)不啟動(dòng)grant-tables，授權(quán)表)

# mysqld_safe --skip-grant-tables

171114 13:45:27 mysqld_safe Logging to '/usr/local/mysql/var/izwz9f40l0qo5cpnn8qwmpz.err'.

171114 13:45:27 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/var

然后就可以不用密碼來(lái)登錄mysql了：

# mysql

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 1

Server version: 5.6.36-log Source distribution

Copyright (c) 2000, 2017, 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.

重置mysql密碼：

mysql>update user set password=password("123456789")where user="root"

刷新權(quán)限：

mysql>flush privileges;

密碼修改完成！

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