方法1: 用set password命令
mysql -u root
mysql> set password for 'root'@'localhost' = password('newpass');
方法2:用mysqladmin
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
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;