MySQL 修改 root 密码的多种方法

方法1: 用 SET PASSWORD 命令

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mysql -u root
mysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('newpass');

方法2:用 mysqladmin

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mysqladmin -u root password "newpass"

# 如果root已经设置过密码,采用如下方法:

mysqladmin -u root password oldpass "newpass"

方法3: 用 UPDATE 直接编辑 user 表

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mysql -u root
mysql> use mysql;
mysql> UPDATE user SET Password = PASSWORD('newpass') WHERE user = 'root';
mysql> FLUSH PRIVILEGES;

# 在丢失root密码的时候,可以这样:

mysqld_safe --skip-grant-tables&
mysql -u root mysql
mysql> UPDATE user SET password=PASSWORD("new password") WHERE user='root';
mysql> FLUSH PRIVILEGES;