mysql 忘记本地密码

MySQL本地管理员忘记密码

解决办法

1.重启数据库到无验证模式

[root@oldboy ~]# vim /etc/my.cnf 
[root@oldboy ~]# cat /etc/my.cnf 
[mysqld]
user=mysql
basedir=/usr/local/mysql
datadir=/data/3306/data
port=3306
socket=/tmp/mysql.sock
skip-grant-tables
skip-networking
[client]
socket=/tmp/mysql.sock
[root@oldboy ~]# systemctl restart mysqld.service 

2.修改登录密码

[root@oldboy ~]# mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 7
Server version: 8.0.20 MySQL Community Server - GPL

Copyright (c) 2000, 2020, 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> 
mysql> flush privileges;   #重新加载授权表
Query OK, 0 rows affected (0.01 sec)

mysql> alter user root@'localhost' identified by '123456';
Query OK, 0 rows affected (0.00 sec)
[root@oldboy ~]# vim /etc/my.cnf 
[root@oldboy ~]# cat /etc/my.cnf 
[mysqld]
user=mysql
basedir=/usr/local/mysql
datadir=/data/3306/data
port=3306
socket=/tmp/mysql.sock
[client]
socket=/tmp/mysql.sock

3.正常启动数据库

[root@oldboy ~]# systemctl restart mysqld.service 
[root@oldboy ~]# mysql -uroot -p123456
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.20 MySQL Community Server - GPL

Copyright (c) 2000, 2020, 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>