MySQL8.0+ 忘记 root 密码，如何重置密码
MySQL8.0密码要求
需要大小写、字母、字符就皆有，这种不常用密码组合就很容易忘记
演示的MySQL版本
[root@ementorship data]# mysql --version
mysql Ver 8.0.26 for Linux on x86_64 (Source distribution)
停止MySQL
systemctl stop mysqld
修改配置文件，添加 skip-grant-table（跳过权限验证）
vim /etc/my.cnf
重启MySQL
systemctl restart mysqld
查看MySQL状态
[root@ementorship my.cnf.d]# systemctl status mysqld
● mysqld.service - MySQL 8.0 database server
Loaded: loaded (/usr/lib/systemd/system/mysqld.service; disabled; vendor preset: disabled)
Active: active (running) since Wed 2023-04-19 15:36:21 CST; 24s ago
Process: 73978 ExecStartPost=/usr/libexec/mysql-check-upgrade (code=exited, status=0/SUCCESS)
Process: 73894 ExecStartPre=/usr/libexec/mysql-prepare-db-dir mysqld.service (code=exited, status=0/SUCCESS)
Process: 73869 ExecStartPre=/usr/libexec/mysql-check-socket (code=exited, status=0/SUCCESS)
Main PID: 73932 (mysqld)
Status: "Server is operational"
Tasks: 37 (limit: 201000)
Memory: 364.1M
CGroup: /system.slice/mysqld.service
└─73932 /usr/libexec/mysqld --basedir=/usr
Apr 19 15:36:20 ementorship systemd[1]: Starting MySQL 8.0 database server...
Apr 19 15:36:21 ementorship systemd[1]: Started MySQL 8.0 database server.
免密码登录
mysql -u root -p
- 直接回车即可
[root@ementorship my.cnf.d]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 7
Server version: 8.0.26 Source distribution
Copyright (c) 2000, 2021, 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>
密码重置（MySQL8.0+版本与之前版本有所不同）
flush privileges;
use mysql;
update user set authentication_string='' where user='root';
ALTER user 'root'@'localhost' IDENTIFIED BY 'Pwd1234@';
- 关闭免密登陆
vim /etc/my.cnf
删除 skip-grant-table
- 重启MySQL
systemctl restart mysqld
- 登录MySQL（密码输入不显示）
mysql -u root -p