MySQL·忘记密码

1、首先停止数据库

[root@localhost /]# systemctl stop mariadb.service

2、在my.cnf中加入skip-grant-tables 

[root@localhost /]# vi etc/my.cnf

在[mysqld]的段中加上一句：skip-grant-tables 
[mysqld]

skip-grant-tables 

然后保存

[root@localhost /]# systemctl restart mariadb.service

3、进入mysql

[root@localhost /]# mysql
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 2
Server version: 5.5.35-MariaDB MariaDB Server


Copyright (c) 2000, 2013, Oracle, Monty Program Ab and others.


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

MariaDB [(none)]> 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

4、update更新密码

MariaDB [mysql]> UPDATE user SET Password=password('123456')WHERE User='root';
Query OK, 4 rows affected (0.01 sec)
Rows matched: 4  Changed: 4  Warnings: 0


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


MariaDB [mysql]> quit

Bye

5、在[mysqld]的段中删除或注释：skip-grant-tables 

[mysqld]

#skip-grant-tables 

进入my.cnf 删除后并重启MySQL

root@localhost /]# vi etc/my.cnf

[root@localhost /]# systemctl restart mariadb.service

进入MySQL

[root@localhost /]# mysql -u root -p123456

Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 2
Server version: 5.5.35-MariaDB MariaDB Server