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1.開(kāi)啟跳過(guò)權(quán)限驗(yàn)證

vi /etc/my.cnf
[mysqld]
skip-grant-tables

/etc/init.d/mysqld restart

2.重置密碼

use mysql;
update user set authentication_string=password('123456') where user='root' and host='localhost';
flush privileges;

/etc/init.d/mysqld restart

vi /etc/my.cnf
[mysqld]
skip-grant-tables    #delete

/etc/init.d/mysqld restart

ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';