[mysql]修改用户密码

### 方法1# mysqladmin -uroot -h hostname password 'new-password' -p;### 方法2mysql> SET PASSWORD FOR 'user'@'host'=PASSWORD('new-password');### 方法3mysql> UPDATE mysql.user SET PASSWORD=PASSWORD('new-password') WHERE condition;### 方法4mysql> GRANT PRIVILEGES ON *.* TO 'user'@'host' IDENTIFIED BY 'pass-world';