方法1: 用SET PASSWORD命令
mysql -u root mysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('newpass');
mysqladmin -u root password "newpass"
mysqladmin -u root password oldpass "newpass"
mysql -u root mysql> use mysql; mysql> UPDATE user SET Password = PASSWORD('newpass') WHERE user = 'root'; mysql> FLUSH PRIVILEGES;
mysqld_safe --skip-grant-tables& mysql -u root mysql mysql> UPDATE user SET password=PASSWORD("new password") WHERE user='root'; mysql> FLUSH PRIVILEGES;
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