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测试环境

• VMware Rocky Linux 9.4
• MySQL 8.0.36

修改MySQL配置文件, 设置为免密登录

修改/etc/my.cnf.d/mysql-server.cnf, 在[mysqld]结尾添加一行skip-grant-tables

[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
log-error=/var/log/mysql/mysqld.log
pid-file=/run/mysqld/mysqld.pid
skip-grant-tables

重启MySQL服务

systemctl restart mysqld

连接MySQL，修改密码

mysql

连接成功后，执行如下sql命令

use mysql;
flush privileges;
alter user 'root'@'localhost' identified by 'your_new_password';
grant all privileges on *.* to "root"@'localhost';
flush privileges;

还原配置文件并重启MySQL服务

修改/etc/my.cnf.d/mysql-server.cnf, 删掉开头加的skip-grant-tables，再重启服务即可

systemctl restart mysqld

参考

https://blog.csdn.net/Box_clf/article/details/124599166
https://blog.namichong.com/learn/sql/mysql/mysql_8.0_reset_password.html