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已經(jīng)設(shè)置過密碼，采用如下方法
mysqladmin -u root
password oldpass "newpass"
方法3： 用UPDATE直接編輯user表
mysql -u
root
mysql> use mysql;
mysql> UPDATE user SET Password =
PASSWORD('newpass') WHERE user = 'root';
mysql> FLUSH
PRIVILEGES;
在丟失root密碼的時(shí)候，可以這樣
mysqld_safe
--skip-grant-tables&
mysql -u root mysql
mysql> UPDATE user SET
password=PASSWORD("new password") WHERE user='root';
mysql> FLUSH
PRIVILEGES;