Linux下忘记mysql的root用户密码解决方法 忘记mysql密码 mysql修改密码方法

原因

不小心 把自己在公司的测试机上的mysql root 密码给忘记了，网上有很多方法，但这个是我试过的 包成功哦

解决过程

注意 有时看 .mysql_history 就行了 



首先 要把mysqld 进程停止 最后是用正常的停止服务方法  实在不行  kill or killall 你自己选择
接着

用--skip-grant-tables参数启动mysqld

# 其中/usr/local/mysql/bin是我的mysql安装目录
[root@localhost /]#/usr/local/mysql/bin/mysqld_safe --skip-grant-tables&

新办法 也可用于 mariadb 
my.cnf  
在[mysqld] 下添加
 skip-grant-tables=1



#不用密码进入mysql
[root@localhost /]/usr/local/mysql/bin/mysql

#切换到mysql database good
mysql> use mysql;
#将mysql root密码该为123456#了

#mysql5.7 
ALTER USER 'root'@'localhost' IDENTIFIED BY '新密码';
# or
update mysql.user set authentication_string=PASSWORD('123456#') where user='root';
flush privileges;
特别提醒注意的一点是，新版的mysql数据库下的user表中已经没有Password字段了


#这个是mysql5.6之前
UPDATE user SET password=password('123456#') WHERE user='root';
FLUSH PRIVILEGES;

killall mysqld

#登录正常
mysql -uroot -p

mysql5.7忘记密码

vim /etc/my.cnf 或者   vi /etc/my.cnf.d/server.cnf



    top your databases

systemctl stop  mysqld

Modify /etc/my.cnf file add skip-grant-tables

vi /etc/my.cnf # or 
vi /etc/mysql/mysql.conf.d/mysqld.cnf
[mysqld] 
skip-grant-tables


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 authentication_string=PASSWORD("password") where User='root';
Query OK, 1 row affected, 1 warning (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 1

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



    Restart MySQL database

service mysqld restart 新密码 
mysql -u root -p

https://stackoverflow.com/questions/43013730/how-to-change-root-password-in-mysql5-7

https://dev.mysql.com/doc/refman/5.7/en/resetting-permissions.html

mariadb

sudo /etc/init.d/mysql stop 
Stopping mysql (via systemctl): mysql.service.
evan@myxps:~/python/jumpserver$ sudo   vim /etc/mysql/mariadb.conf.d/50-server.cnf



 skip-grant-tables=1


mysql -uroot    无密码登录

use mysql;

#选择一句就行了
update user set authentication_string=password('root'),plugin='mysql_native_password' where user='root';
ALTER USER 'root'@'localhost' IDENTIFIED BY '新密码';

flush privileges;


 vim /etc/mysql/mariadb.conf.d/50-server.cnf  
 将

skip-grant-tables=1 这句#注释掉

 
 

https://www.cnblogs.com/messhair/p/11782850.html

参考

MariaDB 10.4+ 新版本默认初始密码的修改

linux下忘记mysql的root用户密码解决方法–忘记mysql密码