Question

Linux下MySQL忘记root密码怎么办

Answer 1

1、需要root账号登录系统，不用登录mysql；

2、修改/etc/my.cnf，在[mysqld]的段中加：skip-grant-tables
3、重新启动mysqld：/etc/init.d/mysqld restart
4、现在可以修改MySQLroot密码 ：
/usr/bin/mysql
mysql> USE mysql ;

mysql> UPDATE user SET Password = password ( 'new-password' ) WHERE User =
'root' ;
mysql> flush privileges ;
mysql> quit
5、将MySQL的登录设置修改回来
# vi
/etc/my.cnf
[mysqld]的段中的skip-grant-tables删除
保存并且退出vi，重启mysql

Answer 2

1、修改MySQL的登录设置：
在[mysqld]的段中加上的skip-grant-tables
# sed -i '/mysqld/a\skip-grant-tables ' /etc/my.cnf
2、重新启动mysqld
# service mysqld restart
Shutting down MySQL. SUCCESS!
Starting MySQL. SUCCESS!
3、登录并修改MySQL的root密码
# /usr/bin/mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.19 Source distribution
Copyright (c) 2000, 2014, 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.
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 ( 'linuxidc' ) WHERE User = 'root' ;
Query OK, 3 rows affected (0.01 sec)
Rows matched: 3 Changed: 3 Warnings: 0

mysql> flush privileges ;
Query OK, 0 rows affected (0.01 sec)
mysql> quit
Bye
4、将MySQL的登录设置修改回来
将刚才在[mysqld]的段中加上的skip-grant-tables删除
# sed -i "/skip-grant-tables/d" /etc/my.cnf
5、重新启动mysqld
# service mysqld restart
Shutting down MySQL. SUCCESS!
Starting MySQL. SUCCESS!
这个时候，就可以使用root/linuxidc进行登录了

Answer 3

Cent OS8.0版本的LINUX忘了ROOT密码，视频教程