linux mysql8忘记密码的解决方案
更新时间:2026年04月17日 09:37:02 作者:搬砖的梦先生
本文介绍了两种MySQL重置密码的方法:一是关闭登录验证重置密码,二是开启登录验证后重置密码,前者需要修改my.cnf配置文件并添加skip-grant-tables,后者则需删除此配置并直接输入新密码
1、关闭mysql登录验证
停止mysql
$ systemctl stop mysqld.service
修改/etc/my.cnf,跳过权限验证
在my.cnf 下面添加
skip-grant-tables
启动mysql
$ systemctl start mysqld.service
2、重置mysql密码
重置root密码为空
update user set authentication_string='' where user='root';
查看root密码是否为空
select user, authentication_string from mysql.user;
保存修改
flush privileges;
示例如下:
$ mysql -u root Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 7 Server version: 8.0.32 Source distribution Copyright (c) 2000, 2023, Oracle and/or its affiliates. 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> 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='' where user='root'; Query OK, 1 row affected (0.00 sec) Rows matched: 1 Changed: 1 Warnings: 0 mysql> select user, authentication_string from mysql.user; +------------------+------------------------------------------------------------------------+ | user | authentication_string | +------------------+------------------------------------------------------------------------+ | root | | | mysql.infoschema | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | | mysql.session | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | | mysql.sys | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | +------------------+------------------------------------------------------------------------+ 6 rows in set (0.01 sec) mysql> flush privileges; Query OK, 0 rows affected (0.00 sec) mysql> \q Bye
3、开启mysql登录验证
停止mysql
$ systemctl stop mysqld.service
修改/etc/my.cnf,把my.cnf 下面添加的skip-grant-tables删除
启动mysql
$ systemctl start mysqld.service
4、修改mysql密码
使用下面命令登录,在输入密码的那一步直接回车
$ mysql -uroot -p
修改root密码
‘root’@‘%’: root可以允许任务机器连接
alter user 'root'@'%' identified by '你的密码';
查看root密码
select user, authentication_string from mysql.user;
保存修改
flush privileges;
示例如下:
$ mysql -uroot -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 8 Server version: 8.0.32 Source distribution Copyright (c) 2000, 2023, Oracle and/or its affiliates. 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> 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> alter user 'root'@'%' identified by 'mysql.root_2023'; Query OK, 0 rows affected (0.00 sec) mysql> select user, authentication_string from mysql.user; +------------------+------------------------------------------------------------------------+ | user | authentication_string | +------------------+------------------------------------------------------------------------+ | root | *A780CA81542274F7A6F52BBC40B7B2E2F9BE8A0F | | mysql.infoschema | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | | mysql.session | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | | mysql.sys | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | +------------------+------------------------------------------------------------------------+ 6 rows in set (0.01 sec) mysql> flush privileges; Query OK, 0 rows affected (0.00 sec) mysql> \q Bye
总结
以上为个人经验,希望能给大家一个参考,也希望大家多多支持脚本之家。


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